Unable to log in

[teddybeermaniac]

This issue respects the following points:

• I have read the FAQ
• I have searched for existing issues
• The issue affects the Notes Android app, neither the Notes server app nor the Nextcloud Android app.

Describe the bug

Steps to reproduce:

1. Install the app.
2. Open the app.
3. Select an account.
4. java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $ (in 4.4.2, 4.5.0 and 4.5.1 I got the same error message, except it also crashes since 4.5.0 due to App crashes when viewing error log after synchronization failure in version 4.5.0 #2849).

Additional data:

• In case it's needed - full application log since start of the app until the crash (I put the relevant portion under Stacktrace at the bottom).
• Server's response to /ocs/v2.php/cloud/capabilities?format=json which seems to come from the code that threw the exception.

Full log:

--------- beginning of main
10-17 21:11:38.589 15232 15232 I Zygote  : Process 15232 crated for it.niedermann.owncloud.notes
10-17 21:11:38.589 15232 15232 I .owncloud.notes: Using CollectorTypeCMC GC.
10-17 21:11:38.591 15232 15232 E .owncloud.notes: Not starting debugger since process cannot load the jdwp agent.
10-17 21:11:38.593 15232 15232 D nativeloader: Load libframework-connectivity-tiramisu-jni.so using APEX ns com_android_tethering for caller /apex/com.android.tethering/javalib/framework-connectivity-t.jar: ok
10-17 21:11:38.600 15232 15232 D ApplicationLoaders: Returning zygote-cached class loader: /system_ext/framework/androidx.window.extensions.jar
10-17 21:11:38.600 15232 15232 D ApplicationLoaders: Returning zygote-cached class loader: /system_ext/framework/androidx.window.sidecar.jar
10-17 21:11:38.628 15232 15232 D nativeloader: Configuring clns-9 for other apk /data/app/~~UMrOvTOUYyh-VHt33bdgDQ==/it.niedermann.owncloud.notes-mu97vKb4Mwbtul3k2Z2BAg==/base.apk. target_sdk_version=35, uses_libraries=, library_path=/data/app/~~UMrOvTOUYyh-VHt33bdgDQ==/it.niedermann.owncloud.notes-mu97vKb4Mwbtul3k2Z2BAg==/lib/arm64:/data/app/~~UMrOvTOUYyh-VHt33bdgDQ==/it.niedermann.owncloud.notes-mu97vKb4Mwbtul3k2Z2BAg==/base.apk!/lib/arm64-v8a, permitted_path=/data:/mnt/expand:/data/user/0/it.niedermann.owncloud.notes
10-17 21:11:38.629 15232 15232 D CompatChangeReporter: Compat change id reported: 202956589; UID 10309; state: ENABLED
10-17 21:11:38.634 15232 15232 V GraphicsEnvironment: Currently set values for:
10-17 21:11:38.634 15232 15232 V GraphicsEnvironment:   angle_gl_driver_selection_pkgs=[com.android.angle, com.google.android.apps.tachyon]
10-17 21:11:38.634 15232 15232 V GraphicsEnvironment:   angle_gl_driver_selection_values=[angle, native]
10-17 21:11:38.634 15232 15232 V GraphicsEnvironment: it.niedermann.owncloud.notes is not listed in per-application setting
10-17 21:11:38.634 15232 15232 V GraphicsEnvironment: ANGLE allowlist from config: 
10-17 21:11:38.634 15232 15232 V GraphicsEnvironment: it.niedermann.owncloud.notes is not listed in ANGLE allowlist or settings, returning default
10-17 21:11:38.634 15232 15232 V GraphicsEnvironment: Neither updatable production driver nor prerelease driver is supported.
10-17 21:11:38.636 15232 15232 D CompatChangeReporter: Compat change id reported: 279646685; UID 10309; state: ENABLED
10-17 21:11:38.637 15232 15232 D WM-WrkMgrInitializer: Initializing WorkManager with default configuration.
10-17 21:11:38.638 15232 15232 D WM-PackageManagerHelper: Skipping component enablement for androidx.work.impl.background.systemjob.SystemJobService
10-17 21:11:38.638 15232 15232 D WM-Schedulers: Created SystemJobScheduler and enabled SystemJobService
10-17 21:11:38.639 15232 15263 D WM-ForceStopRunnable: The default process name was not specified.
10-17 21:11:38.639 15232 15263 D WM-ForceStopRunnable: Performing cleanup operations.
10-17 21:11:38.640 15232 15232 V BrandingUtil: --- Read: shared_preference_theme_main
10-17 21:11:38.642 15232 15263 E ashmem  : Pinning is deprecated since Android Q. Please use trim or other methods.
10-17 21:11:38.644 15232 15232 D WM-RescheduleReceiver: Received intent Intent { act=android.intent.action.BOOT_COMPLETED flg=0x9000030 pkg=it.niedermann.owncloud.notes cmp=it.niedermann.owncloud.notes/androidx.work.impl.background.systemalarm.RescheduleReceiver (has extras) }
--------- beginning of system
10-17 21:11:38.646 15232 15280 I DisplayManager: Choreographer implicitly registered for the refresh rate.
10-17 21:11:38.646 15232 15280 D vulkan  : searching for layers in '/data/app/~~UMrOvTOUYyh-VHt33bdgDQ==/it.niedermann.owncloud.notes-mu97vKb4Mwbtul3k2Z2BAg==/lib/arm64'
10-17 21:11:38.647 15232 15280 D vulkan  : searching for layers in '/data/app/~~UMrOvTOUYyh-VHt33bdgDQ==/it.niedermann.owncloud.notes-mu97vKb4Mwbtul3k2Z2BAg==/base.apk!/lib/arm64-v8a'
10-17 21:11:38.647 15232 15232 D AppCompatDelegate: Checking for metadata for AppLocalesMetadataHolderService : Service not found
10-17 21:11:38.648 15232 15263 D WM-SystemJobScheduler: Reconciling jobs
10-17 21:11:38.649 15232 15263 D WM-ForceStopRunnable: Application was force-stopped, rescheduling.
10-17 21:11:38.652 15232 15263 D CompatChangeReporter: Compat change id reported: 311402873; UID 10309; state: ENABLED
10-17 21:11:38.652 15232 15263 D CompatChangeReporter: Compat change id reported: 323349338; UID 10309; state: ENABLED
10-17 21:11:38.652 15232 15263 D WM-SystemJobScheduler: Scheduling work ID 2b1bed01-dbd8-40ac-8daa-f182458b4d50Job ID 76
10-17 21:11:38.654 15232 15232 D CompatChangeReporter: Compat change id reported: 309578419; UID 10309; state: ENABLED
10-17 21:11:38.654 15232 15232 D DesktopExperienceFlags: Toggle override initialized to: false
10-17 21:11:38.654 15232 15232 D DesktopModeFlags: Toggle override initialized to: OVERRIDE_UNSET
10-17 21:11:38.656 15232 15291 D WM-PackageManagerHelper: Skipping component enablement for androidx.work.impl.background.systemalarm.RescheduleReceiver
10-17 21:11:38.657 15232 15232 I HWUI    : Using FreeType backend (prop=Auto)
10-17 21:11:38.663 15232 15232 D NotesRepository: Network connection established.
10-17 21:11:38.663 15232 15232 I CapabilitiesWorker: Deregistering all workers with tag "capabilities"
10-17 21:11:38.663 15232 15232 I CapabilitiesWorker: Registering capabilities worker running each 24 hours.
10-17 21:11:38.664 15232 15263 D WM-Processor: Processor cancelling 2b1bed01-dbd8-40ac-8daa-f182458b4d50
10-17 21:11:38.664 15232 15263 D WM-Processor: WorkerWrapper could not be found for 2b1bed01-dbd8-40ac-8daa-f182458b4d50
10-17 21:11:38.669 15232 15232 D CompatChangeReporter: Compat change id reported: 63938206; UID 10309; state: ENABLED
10-17 21:11:38.670 15232 15232 D CompatChangeReporter: Compat change id reported: 352594277; UID 10309; state: ENABLED
10-17 21:11:38.672 15232 15263 D WM-GreedyScheduler: Cancelling work ID 2b1bed01-dbd8-40ac-8daa-f182458b4d50
10-17 21:11:38.673 15232 15232 D CompatChangeReporter: Compat change id reported: 303326708; UID 10309; state: ENABLED
10-17 21:11:38.673 15232 15263 W JobInfo : Requested important-while-foreground flag for job77 is ignored and takes no effect
10-17 21:11:38.674 15232 15263 D WM-SystemJobScheduler: Scheduling work ID b73b59bd-327c-425e-becd-5d1ac0ec35daJob ID 77
10-17 21:11:38.675 15232 15263 D WM-GreedyScheduler: Starting tracking for b73b59bd-327c-425e-becd-5d1ac0ec35da
10-17 21:11:38.677 15232 15263 D WM-ConstraintTracker: NetworkStateTracker24: initial state = NetworkState(isConnected=true, isValidated=true, isMetered=false, isNotRoaming=true)
10-17 21:11:38.677 15232 15263 D WM-NetworkStateTracker: Registering network callback
10-17 21:11:38.677 15232 15263 D WM-GreedyScheduler: Constraints met: Scheduling work ID WorkGenerationalId(workSpecId=b73b59bd-327c-425e-becd-5d1ac0ec35da, generation=0)
10-17 21:11:38.678 15232 15263 D WM-Processor: Processor: processing WorkGenerationalId(workSpecId=b73b59bd-327c-425e-becd-5d1ac0ec35da, generation=0)
10-17 21:11:38.678 15232 15294 D WM-NetworkStateTracker: Network capabilities changed: [ Transports: WIFI Capabilities: NOT_METERED&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&VALIDATED&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED&NOT_VCN_MANAGED&NOT_BANDWIDTH_CONSTRAINED LinkUpBandwidth>=12000Kbps LinkDnBandwidth>=39265Kbps TransportInfo: <SSID: <unknown ssid>, BSSID: 02:00:00:00:00:00, MAC: 02:00:00:00:00:00, IP: /192.168.1.100, Security type: 2, Supplicant state: COMPLETED, Wi-Fi standard: 11ax, RSSI: -44, Link speed: 286Mbps, Tx Link speed: 286Mbps, Max Supported Tx Link speed: 286Mbps, Rx Link speed: 286Mbps, Max Supported Rx Link speed: 286Mbps, Frequency: 2462MHz, Net ID: -1, Metered hint: false, score: 51, isUsable: true, CarrierMerged: false, SubscriptionId: -1, IsPrimary: -1, Trusted: true, Restricted: false, Ephemeral: false, OEM paid: false, OEM private: false, OSU AP: false, FQDN: <none>, Provider friendly name: <none>, Requesting package name: <none><none>MLO Information: , Is TID-To-Link negotiation supported by the AP: false, AP MLD Address: <none>, AP MLO Link Id: <none>, AP MLO Affiliated links: <none>, Vendor Data: <none>> SignalStrength: -44 UnderlyingNetworks: Null]
10-17 21:11:38.679 15232 15232 V BrandingUtil: --- Read: shared_preference_theme_main
10-17 21:11:38.680 15232 15232 V BrandingUtil: --- Read: shared_preference_theme_main
10-17 21:11:38.680 15232 15232 D DefaultSelectionTracker: Ignoring onDataSetChange. No active selection.
10-17 21:11:38.681 15232 15232 D DefaultSelectionTracker: Ignoring onDataSetChange. No active selection.
10-17 21:11:38.681 15232 15232 I ContentCaptureHelper: Setting logging level to OFF
10-17 21:11:38.683 15232 15232 D CompatChangeReporter: Compat change id reported: 349153669; UID 10309; state: ENABLED
10-17 21:11:38.689 15232 15232 D NotesRepository: Network connection established with WiFi
10-17 21:11:38.689 15232 15232 D NotesRepository: Network connection established.
10-17 21:11:38.690 15232 15232 D WM-WorkerWrapper: Starting work for it.niedermann.owncloud.notes.persistence.CapabilitiesWorker
10-17 21:11:38.695 15232 15232 D AutofillManager: view not autofillable - not passing ime action check
10-17 21:11:38.696 15232 15232 D WindowOnBackDispatcher: setTopOnBackInvokedCallback (unwrapped): android.view.ViewRootImpl$$ExternalSyntheticLambda12@913bda7
10-17 21:11:38.700 15232 15232 W RecyclerView: No adapter attached; skipping layout
10-17 21:11:38.720 15232 15232 D WM-SystemJobService: onStartJob for WorkGenerationalId(workSpecId=b73b59bd-327c-425e-becd-5d1ac0ec35da, generation=0)
10-17 21:11:38.721 15232 15291 D WM-Processor: Work WorkGenerationalId(workSpecId=b73b59bd-327c-425e-becd-5d1ac0ec35da, generation=0) is already enqueued for processing
10-17 21:11:38.721 15232 15291 I WM-WorkerWrapper: Worker result SUCCESS for Work [ id=b73b59bd-327c-425e-becd-5d1ac0ec35da, tags={ it.niedermann.owncloud.notes.persistence.CapabilitiesWorker } ]
10-17 21:11:38.730 15232 15232 D WM-Processor: Processor b73b59bd-327c-425e-becd-5d1ac0ec35da executed; reschedule = false
10-17 21:11:38.730 15232 15232 D WM-GreedyScheduler: Stopping tracking for WorkGenerationalId(workSpecId=b73b59bd-327c-425e-becd-5d1ac0ec35da, generation=0)
10-17 21:11:38.730 15232 15232 D WM-SystemJobService: b73b59bd-327c-425e-becd-5d1ac0ec35da executed on JobScheduler
10-17 21:11:38.734 15232 15232 D CompatChangeReporter: Compat change id reported: 270674727; UID 10309; state: ENABLED
10-17 21:11:38.734 15232 15232 I ContentCaptureHelper: Setting logging level to OFF
10-17 21:11:38.735 15232 15290 D WM-GreedyScheduler: Cancelling work ID b73b59bd-327c-425e-becd-5d1ac0ec35da
10-17 21:11:38.737 15232 15290 D WM-SystemJobScheduler: Scheduling work ID b73b59bd-327c-425e-becd-5d1ac0ec35daJob ID 78
10-17 21:11:38.737 15232 15290 D WM-NetworkStateTracker: Unregistering network callback
10-17 21:11:38.738 15232 15232 D WM-SystemJobService: onStopJob for WorkGenerationalId(workSpecId=b73b59bd-327c-425e-becd-5d1ac0ec35da, generation=0)
10-17 21:11:38.739 15232 15232 D WindowOnBackDispatcher: setTopOnBackInvokedCallback (unwrapped): android.view.ViewRootImpl$$ExternalSyntheticLambda12@b24e13b
10-17 21:11:38.891 15232 15232 D VRI[MainActivity]: visibilityChanged oldVisibility=true newVisibility=false
10-17 21:11:38.909 15232 15232 D ImeBackDispatcher: switch root view (mImeCallbacks.size=0)
10-17 21:11:38.913 15232 15232 D InsetsController: hide(ime())
10-17 21:11:38.913 15232 15232 I ImeTracker: it.niedermann.owncloud.notes:4701e00: onCancelled at PHASE_CLIENT_ALREADY_HIDDEN
10-17 21:11:40.550 15232 15232 V com.nextcloud.android.sso.AccountImporter: com.nextcloud.android.beta
10-17 21:11:40.615 15232 15232 D ImeBackDispatcher: Clear (mImeCallbacks.size=0)
10-17 21:11:40.615 15232 15232 D ImeBackDispatcher: switch root view (mImeCallbacks.size=0)
10-17 21:11:43.671 15232 15338 D ProfileInstaller: Skipping profile installation for it.niedermann.owncloud.notes
10-17 21:11:44.692 15232 15232 D ImeBackDispatcher: switch root view (mImeCallbacks.size=0)
10-17 21:11:44.693 15232 15232 D InsetsController: hide(ime())
10-17 21:11:44.693 15232 15232 I ImeTracker: it.niedermann.owncloud.notes:8e64da4c: onCancelled at PHASE_CLIENT_ALREADY_HIDDEN
10-17 21:11:46.442 15232 15355 I ImportAccountActivity: Added account: name:teddy_beer_maniac@nextcloud.**SNIP**:443, https://nextcloud.**SNIP**:443, userIdteddy_beer_maniac
10-17 21:11:46.442 15232 15355 I ImportAccountActivity: Loading capabilities for teddy_beer_maniac@nextcloud.**SNIP**:443
10-17 21:11:46.442 15232 15355 V ApiProvider: NextcloudRequest account: teddy_beer_maniac@nextcloud.**SNIP**:443
10-17 21:11:46.448 15232 15356 D com.nextcloud.android.sso.api.NetworkRequest: [connectApiWithBackoff] connectApiWithBackoff() called from Thread: [Thread-4]
10-17 21:11:46.449 15232 15355 D com.nextcloud.android.sso.api.NextcloudRetrofitServiceMethod: NextcloudRetrofitServiceMethod() called with: apiEndpoint = [/ocs/v2.php/cloud/], method = [public abstract io.reactivex.Observable it.niedermann.owncloud.notes.persistence.sync.OcsAPI.getCapabilities(java.lang.String)]
10-17 21:11:46.449 15232 15355 D com.nextcloud.android.sso.api.NextcloudRetrofitServiceMethod: WARNING: Header not set - key or value missing! Key: If-None-Match | Value: null
10-17 21:11:46.449 15232 15232 D com.nextcloud.android.sso.api.NetworkRequest: [connectApiWithBackoff] trying to connect..
10-17 21:11:46.449 15232 15232 D com.nextcloud.android.sso.api.AidlNetworkRequest: [connect] Binding to AccountManagerService for type [nextcloud]
10-17 21:11:46.449 15232 15232 D com.nextcloud.android.sso.api.NetworkRequest: [connect] connect() called [main] Account-Type: [nextcloud]
10-17 21:11:46.449 15232 15232 D com.nextcloud.android.sso.api.AidlNetworkRequest: [connect] Component name is: [com.nextcloud.client]
10-17 21:11:46.451 15232 15355 D com.nextcloud.android.sso.api.NextcloudRetrofitServiceMethod: invoke call to api using observable com.nextcloud.android.sso.api.ParsedResponse<it.niedermann.owncloud.notes.shared.model.OcsResponse<it.niedermann.owncloud.notes.shared.model.Capabilities>>
10-17 21:11:46.453 15232 15232 D com.nextcloud.android.sso.api.AidlNetworkRequest: [connect] Bound to AccountManagerService successfully
10-17 21:11:46.453 15232 15232 D ImeBackDispatcher: switch root view (mImeCallbacks.size=0)
10-17 21:11:46.455 15232 15355 V com.nextcloud.android.sso.api.AidlNetworkRequest: [waitForApi] - api not ready yet.. waiting [pool-10-thread-1]
10-17 21:11:46.456 15232 15232 D InsetsController: hide(ime())
10-17 21:11:46.456 15232 15232 I ImeTracker: it.niedermann.owncloud.notes:93fc503b: onCancelled at PHASE_CLIENT_ALREADY_HIDDEN
10-17 21:11:46.467 15232 15232 D com.nextcloud.android.sso.api.AidlNetworkRequest: [onServiceConnected] called from Thread: [main] with IBinder [ComponentInfo{com.nextcloud.client/com.owncloud.android.services.AccountManagerService}]: android.os.BinderProxy@28f68d
10-17 21:11:46.468 15232 15232 I com.nextcloud.android.sso.api.NextcloudAPI: Single Sign On API successfully connected.
10-17 21:11:46.472 15232 15357 D com.nextcloud.android.sso.api.AidlNetworkRequest: copy data from service finished
10-17 21:11:47.067 15232 15355 W System.err: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
10-17 21:11:47.067 15232 15355 W System.err: See https://github.com/google/gson/blob/main/Troubleshooting.md#unexpected-json-structure
10-17 21:11:47.067 15232 15355 W System.err: 	at com.google.gson.stream.JsonReader.unexpectedTokenError(JsonReader.java:1831)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:509)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:510)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.google.gson.Gson.fromJson(Gson.java:1358)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.google.gson.Gson.fromJson(Gson.java:1259)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.google.gson.Gson.fromJson(Gson.java:1227)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.nextcloud.android.sso.api.NextcloudAPI.convertStreamToTargetEntity(NextcloudAPI.java:136)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.nextcloud.android.sso.api.NextcloudAPI.lambda$performRequestObservableV2$0(NextcloudAPI.java:98)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.nextcloud.android.sso.api.NextcloudAPI.$r8$lambda$af7W9mq2B0ZrhVJwZd-ibFp8T3Y(Unknown Source:0)
10-17 21:11:47.067 15232 15355 W System.err: 	at com.nextcloud.android.sso.api.NextcloudAPI$$ExternalSyntheticLambda1.subscribe(D8$$SyntheticClass:0)
10-17 21:11:47.067 15232 15355 W System.err: 	at io.reactivex.internal.operators.observable.ObservableFromPublisher.subscribeActual(ObservableFromPublisher.java:31)
10-17 21:11:47.067 15232 15355 W System.err: 	at io.reactivex.Observable.subscribe(Observable.java:12284)
10-17 21:11:47.067 15232 15355 W System.err: 	at io.reactivex.internal.operators.observable.ObservableSingleMaybe.subscribeActual(ObservableSingleMaybe.java:31)
10-17 21:11:47.067 15232 15355 W System.err: 	at io.reactivex.Maybe.subscribe(Maybe.java:4290)
10-17 21:11:47.067 15232 15355 W System.err: 	at io.reactivex.Maybe.blockingGet(Maybe.java:2320)
10-17 21:11:47.067 15232 15355 W System.err: 	at io.reactivex.Observable.blockingSingle(Observable.java:5381)
10-17 21:11:47.067 15232 15355 W System.err: 	at it.niedermann.owncloud.notes.persistence.CapabilitiesClient.getCapabilities(CapabilitiesClient.java:38)
10-17 21:11:47.067 15232 15355 W System.err: 	at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity.lambda$onActivityResult$5(ImportAccountActivity.java:103)
10-17 21:11:47.067 15232 15355 W System.err: 	at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity.$r8$lambda$wIJzzcgrzM9d6k7exwdLMn3GvgQ(Unknown Source:0)
10-17 21:11:47.067 15232 15355 W System.err: 	at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity$$ExternalSyntheticLambda4.run(D8$$SyntheticClass:0)
10-17 21:11:47.067 15232 15355 W System.err: 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:524)
10-17 21:11:47.067 15232 15355 W System.err: 	at java.util.concurrent.FutureTask.run(FutureTask.java:317)
10-17 21:11:47.067 15232 15355 W System.err: 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
10-17 21:11:47.067 15232 15355 W System.err: 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
10-17 21:11:47.067 15232 15355 W System.err: 	at java.lang.Thread.run(Thread.java:1119)
10-17 21:11:47.067 15232 15355 V ApiProvider: Invalidating API cache for teddy_beer_maniac@nextcloud.**SNIP**:443
10-17 21:11:47.068 15232 15355 D com.nextcloud.android.sso.api.AidlNetworkRequest: [unbindService] Unbinding AccountManagerService
10-17 21:11:47.075 15232 15232 W WindowOnBackDispatcher: OnBackInvokedCallback is not enabled for the application.
10-17 21:11:47.075 15232 15232 W WindowOnBackDispatcher: Set 'android:enableOnBackInvokedCallback="true"' in the application manifest.
10-17 21:11:47.087 15232 15232 D AndroidRuntime: Shutting down VM
--------- beginning of crash
10-17 21:11:47.087 15232 15232 E AndroidRuntime: FATAL EXCEPTION: main
10-17 21:11:47.087 15232 15232 E AndroidRuntime: Process: it.niedermann.owncloud.notes, PID: 15232
10-17 21:11:47.087 15232 15232 E AndroidRuntime: java.lang.NoSuchMethodError: No virtual method getTypes()Ljava/util/Set; in class Lcom/nextcloud/android/sso/FilesAppTypeRegistry; or its super classes (declaration of 'com.nextcloud.android.sso.FilesAppTypeRegistry' appears in /data/app/~~UMrOvTOUYyh-VHt33bdgDQ==/it.niedermann.owncloud.notes-mu97vKb4Mwbtul3k2Z2BAg==/base.apk!classes5.dex)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at it.niedermann.nextcloud.exception.ExceptionUtil.getAppVersions(ExceptionUtil.kt:101)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at it.niedermann.nextcloud.exception.ExceptionUtil.getDebugInfos(ExceptionUtil.kt:47)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at it.niedermann.nextcloud.exception.ExceptionUtil.getDebugInfos(ExceptionUtil.kt:37)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at it.niedermann.owncloud.notes.exception.ExceptionDialogFragment.onCreateDialog(ExceptionDialogFragment.java:66)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.DialogFragment.prepareDialog(DialogFragment.java:925)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.DialogFragment.onGetLayoutInflater(DialogFragment.java:839)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.Fragment.performGetLayoutInflater(Fragment.java:1760)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:547)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:286)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2214)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2115)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:2052)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:703)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at android.os.Handler.handleCallback(Handler.java:1041)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:103)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at android.os.Looper.dispatchMessage(Looper.java:315)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at android.os.Looper.loopOnce(Looper.java:251)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:349)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:9041)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:593)
10-17 21:11:47.087 15232 15232 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:929)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: No virtual method getTypes()Ljava/util/Set; in class Lcom/nextcloud/android/sso/FilesAppTypeRegistry; or its super classes (declaration of 'com.nextcloud.android.sso.FilesAppTypeRegistry' appears in /data/app/~~UMrOvTOUYyh-VHt33bdgDQ==/it.niedermann.owncloud.notes-mu97vKb4Mwbtul3k2Z2BAg==/base.apk!classes5.dex)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: java.lang.NoSuchMethodError: No virtual method getTypes()Ljava/util/Set; in class Lcom/nextcloud/android/sso/FilesAppTypeRegistry; or its super classes (declaration of 'com.nextcloud.android.sso.FilesAppTypeRegistry' appears in /data/app/~~UMrOvTOUYyh-VHt33bdgDQ==/it.niedermann.owncloud.notes-mu97vKb4Mwbtul3k2Z2BAg==/base.apk!classes5.dex)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at it.niedermann.nextcloud.exception.ExceptionUtil.getAppVersions(ExceptionUtil.kt:101)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at it.niedermann.nextcloud.exception.ExceptionUtil.getDebugInfos(ExceptionUtil.kt:47)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at it.niedermann.nextcloud.exception.ExceptionUtil.getDebugInfos(ExceptionUtil.kt:37)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at it.niedermann.owncloud.notes.exception.ExceptionDialogFragment.onCreateDialog(ExceptionDialogFragment.java:66)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.DialogFragment.prepareDialog(DialogFragment.java:925)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.DialogFragment.onGetLayoutInflater(DialogFragment.java:839)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.Fragment.performGetLayoutInflater(Fragment.java:1760)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:547)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:286)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2214)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2115)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:2052)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:703)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at android.os.Handler.handleCallback(Handler.java:1041)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at android.os.Handler.dispatchMessage(Handler.java:103)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at android.os.Looper.dispatchMessage(Looper.java:315)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at android.os.Looper.loopOnce(Looper.java:251)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at android.os.Looper.loop(Looper.java:349)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at android.app.ActivityThread.main(ActivityThread.java:9041)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at java.lang.reflect.Method.invoke(Native Method)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:593)
10-17 21:11:47.088 15232 15232 E ExceptionHandler: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:929)
10-17 21:11:47.101 15232 15232 I .owncloud.notes: System.exit called, status: 0
10-17 21:11:47.101 15232 15232 I AndroidRuntime: VM exiting with result code 0, cleanup skipped.

Server's response:

Headers:

Cache-Control: no-cache, no-store, must-revalidate
Content-Encoding: gzip
Content-Length: 1666
Content-Security-Policy: default-src 'none';base-uri 'none';manifest-src 'self';frame-ancestors 'none'
Content-Type: application/json; charset=utf-8
Date: Fri, 17 Oct 2025 19:11:44 GMT
Etag: "5ffe4c1f784f42b41a03f67c92e4c3cd"
Feature-Policy: autoplay 'none';camera 'none';fullscreen 'none';geolocation 'none';microphone 'none';payment 'none'
Referrer-Policy: no-referrer
Server: Apache/2.4.65 (Debian)
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-Powered-By: PHP/8.3.26
X-Request-Id: 91kFF8lPfa9Y4UycMtEk
X-Robots-Tag: noindex, nofollow
X-Xss-Protection: 1; mode=block

Body

{
    "ocs": {
        "meta": {
            "status": "ok",
            "statuscode": 200,
            "message": "OK"
        },
        "data": {
            "version": {
                "major": 31,
                "minor": 0,
                "micro": 9,
                "string": "31.0.9",
                "edition": "",
                "extendedSupport": false
            },
            "capabilities": {
                "core": {
                    "pollinterval": 60,
                    "webdav-root": "remote.php/webdav",
                    "reference-api": true,
                    "reference-regex": "(\\s|\\n|^)(https?:\\/\\/)([-A-Z0-9+_.]+(?::[0-9]+)?(?:\\/[-A-Z0-9+&@#%?=~_|!:,.;()]*)*)(\\s|\\n|$)",
                    "mod-rewrite-working": true
                },
                "bruteforce": {
                    "delay": 0,
                    "allow-listed": false
                },
                "files": {
                    "$comment": "\"blacklisted_files\" is deprecated as of Nextcloud 30, use \"forbidden_filenames\" instead",
                    "blacklisted_files": [
                        ".htaccess"
                    ],
                    "forbidden_filenames": [
                        ".htaccess"
                    ],
                    "forbidden_filename_basenames": [],
                    "forbidden_filename_characters": [
                        "\\",
                        "/",
                        "\\",
                        "/"
                    ],
                    "forbidden_filename_extensions": [
                        ".filepart",
                        ".part",
                        ".part"
                    ],
                    "bigfilechunking": true,
                    "chunked_upload": {
                        "max_size": 104857600,
                        "max_parallel_count": 5
                    },
                    "file_conversions": [],
                    "directEditing": {
                        "url": "https://nextcloud.**SNIP**:443/ocs/v2.php/apps/files/api/v1/directEditing",
                        "etag": "5b2f367cfe076ab42b79601036409c2e",
                        "supportsFileId": true
                    },
                    "locking": "1.0",
                    "api-feature-lock-type": true,
                    "undelete": true,
                    "delete_from_trash": true,
                    "versioning": true,
                    "version_labeling": true,
                    "version_deletion": true
                },
                "activity": {
                    "apiv2": [
                        "filters",
                        "filters-api",
                        "previews",
                        "rich-strings"
                    ]
                },
                "ocm": {
                    "enabled": true,
                    "apiVersion": "1.0-proposal1",
                    "version": "1.1.0",
                    "endPoint": "https://nextcloud.**SNIP**:443/ocm",
                    "publicKey": null,
                    "resourceTypes": [
                        {
                            "name": "file",
                            "shareTypes": [
                                "user",
                                "group"
                            ],
                            "protocols": {
                                "webdav": "/public.php/webdav/"
                            }
                        }
                    ]
                },
                "dav": {
                    "chunking": "1.0",
                    "bulkupload": "1.0"
                },
                "files_sharing": {
                    "api_enabled": true,
                    "public": {
                        "enabled": true,
                        "password": {
                            "enforced": false,
                            "askForOptionalPassword": false
                        },
                        "expire_date": {
                            "enabled": true,
                            "days": 7,
                            "enforced": true
                        },
                        "multiple_links": true,
                        "expire_date_internal": {
                            "enabled": false
                        },
                        "expire_date_remote": {
                            "enabled": false
                        },
                        "send_mail": false,
                        "upload": true,
                        "upload_files_drop": true,
                        "custom_tokens": true
                    },
                    "resharing": false,
                    "user": {
                        "send_mail": false,
                        "expire_date": {
                            "enabled": true
                        }
                    },
                    "group_sharing": true,
                    "group": {
                        "enabled": true,
                        "expire_date": {
                            "enabled": true
                        }
                    },
                    "default_permissions": 15,
                    "federation": {
                        "outgoing": false,
                        "incoming": false,
                        "expire_date": {
                            "enabled": false
                        },
                        "expire_date_supported": {
                            "enabled": false
                        }
                    },
                    "sharee": {
                        "query_lookup_default": false,
                        "always_show_unique": true
                    }
                },
                "groupfolders": {
                    "appVersion": "19.1.7",
                    "hasGroupFolders": true
                },
                "notes": {
                    "api_version": [
                        "0.2",
                        "1.3",
                        "1.4"
                    ],
                    "version": "4.12.3",
                    "notes_path": "Documents/Notes"
                },
                "notifications": {
                    "ocs-endpoints": [
                        "list",
                        "get",
                        "delete",
                        "delete-all",
                        "icons",
                        "rich-strings",
                        "action-web",
                        "user-status",
                        "exists",
                        "test-push"
                    ],
                    "push": [
                        "devices",
                        "object-data",
                        "delete"
                    ],
                    "admin-notifications": [
                        "ocs",
                        "cli"
                    ]
                },
                "notify_push": {
                    "type": [
                        "files",
                        "activities",
                        "notifications"
                    ],
                    "endpoints": {
                        "websocket": "wss://nextcloud.**SNIP**/push/ws",
                        "pre_auth": "https://nextcloud.**SNIP**:443/apps/notify_push/pre_auth"
                    }
                },
                "password_policy": {
                    "api": {
                        "generate": "https://nextcloud.**SNIP**:443/ocs/v2.php/apps/password_policy/api/v1/generate",
                        "validate": "https://nextcloud.**SNIP**:443/ocs/v2.php/apps/password_policy/api/v1/validate"
                    },
                    "policies": {
                        "account": {
                            "minLength": 16,
                            "enforceHaveIBeenPwned": true,
                            "enforceNonCommonPassword": true,
                            "enforceNumericCharacters": true,
                            "enforceSpecialCharacters": true,
                            "enforceUpperLowerCase": true
                        }
                    },
                    "minLength": 16,
                    "enforceNonCommonPassword": true,
                    "enforceNumericCharacters": true,
                    "enforceSpecialCharacters": true,
                    "enforceUpperLowerCase": true
                },
                "provisioning_api": {
                    "version": "1.21.0",
                    "AccountPropertyScopesVersion": 2,
                    "AccountPropertyScopesFederatedEnabled": false,
                    "AccountPropertyScopesPublishedEnabled": false
                },
                "theming": {
                    "name": "Nextcloud",
                    "url": "https://nextcloud.**SNIP**",
                    "slogan": "",
                    "color": "#F5E0DC",
                    "color-text": "#000000",
                    "color-element": "#d37765",
                    "color-element-bright": "#d37765",
                    "color-element-dark": "#F5E0DC",
                    "logo": "https://nextcloud.**SNIP**:443/core/img/logo/logo.svg?v=9",
                    "background": "#1E1E2E",
                    "background-text": "#ffffff",
                    "background-plain": true,
                    "background-default": true,
                    "logoheader": "https://nextcloud.**SNIP**:443/core/img/logo/logo.svg?v=9",
                    "favicon": "https://nextcloud.**SNIP**:443/core/img/logo/logo.svg?v=9"
                }
            }
        }
    }
}

Expected behavior

No response

Notes Android version

4.5.1 (tried to use the app when it was at 4.4.2 had the same issue since)

Notes server version

4.12.3

Nextcloud Android version

3.34.0

Nextcloud version

31.0.9

Device

Google Pixel 9 Pro

Android Version

16

App Store

• Google Play Store
• F-Droid
• Huawei App Gallery

Stacktrace

10-17 21:11:47.067 15232 15355 W System.err: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
10-17 21:11:47.067 15232 15355 W System.err: See https://github.com/google/gson/blob/main/Troubleshooting.md#unexpected-json-structure
10-17 21:11:47.067 15232 15355 W System.err: at com.google.gson.stream.JsonReader.unexpectedTokenError(JsonReader.java:1831)
10-17 21:11:47.067 15232 15355 W System.err: at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:509)
10-17 21:11:47.067 15232 15355 W System.err: at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:510)
10-17 21:11:47.067 15232 15355 W System.err: at com.google.gson.Gson.fromJson(Gson.java:1358)
10-17 21:11:47.067 15232 15355 W System.err: at com.google.gson.Gson.fromJson(Gson.java:1259)
10-17 21:11:47.067 15232 15355 W System.err: at com.google.gson.Gson.fromJson(Gson.java:1227)
10-17 21:11:47.067 15232 15355 W System.err: at com.nextcloud.android.sso.api.NextcloudAPI.convertStreamToTargetEntity(NextcloudAPI.java:136)
10-17 21:11:47.067 15232 15355 W System.err: at com.nextcloud.android.sso.api.NextcloudAPI.lambda$performRequestObservableV2$0(NextcloudAPI.java:98)
10-17 21:11:47.067 15232 15355 W System.err: at com.nextcloud.android.sso.api.NextcloudAPI.$r8$lambda$af7W9mq2B0ZrhVJwZd-ibFp8T3Y(Unknown Source:0)
10-17 21:11:47.067 15232 15355 W System.err: at com.nextcloud.android.sso.api.NextcloudAPI$$ExternalSyntheticLambda1.subscribe(D8$$SyntheticClass:0)
10-17 21:11:47.067 15232 15355 W System.err: at io.reactivex.internal.operators.observable.ObservableFromPublisher.subscribeActual(ObservableFromPublisher.java:31)
10-17 21:11:47.067 15232 15355 W System.err: at io.reactivex.Observable.subscribe(Observable.java:12284)
10-17 21:11:47.067 15232 15355 W System.err: at io.reactivex.internal.operators.observable.ObservableSingleMaybe.subscribeActual(ObservableSingleMaybe.java:31)
10-17 21:11:47.067 15232 15355 W System.err: at io.reactivex.Maybe.subscribe(Maybe.java:4290)
10-17 21:11:47.067 15232 15355 W System.err: at io.reactivex.Maybe.blockingGet(Maybe.java:2320)
10-17 21:11:47.067 15232 15355 W System.err: at io.reactivex.Observable.blockingSingle(Observable.java:5381)
10-17 21:11:47.067 15232 15355 W System.err: at it.niedermann.owncloud.notes.persistence.CapabilitiesClient.getCapabilities(CapabilitiesClient.java:38)
10-17 21:11:47.067 15232 15355 W System.err: at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity.lambda$onActivityResult$5(ImportAccountActivity.java:103)
10-17 21:11:47.067 15232 15355 W System.err: at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity.$r8$lambda$wIJzzcgrzM9d6k7exwdLMn3GvgQ(Unknown Source:0)
10-17 21:11:47.067 15232 15355 W System.err: at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity$$ExternalSyntheticLambda4.run(D8$$SyntheticClass:0)
10-17 21:11:47.067 15232 15355 W System.err: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:524)
10-17 21:11:47.067 15232 15355 W System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:317)
10-17 21:11:47.067 15232 15355 W System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
10-17 21:11:47.067 15232 15355 W System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
10-17 21:11:47.067 15232 15355 W System.err: at java.lang.Thread.run(Thread.java:1119)

[teddybeermaniac]

Also - I saw that #2866 looks similar, but its author found a solution, unrelated it seems, to my issue. And then there's #2846, but given that its author didn't provide any specific details I decided to create a new issue as I didn't want to hijack the issue with possibly a different login problem.

[joshtrichards]

The Android Files client version doesn't appear to be 3.34.0 but a beta version. What version is it? And is it seemingly functioning fine?

This almost always means the client received a non-JSON response, like an error string or HTML. So typically something weird server-side or at the proxy (or WAF) level.

Were the HTTP headers/contents grabbed from an intercept or rather by retrieving manually? If the latter, from the same or a different device?

[teddybeermaniac]

Hi @joshtrichards,
Thanks for looking at my issue - your last question was the right one to ask and it pushed me into the direction of a solution. I still don't fully understand what is happening, but I was able to log in. 🙂

The response that I provided was captured using mitmproxy, which was placed in between Nextcloud and Traefik.
I didn't have any issues with my Traefik setup and I didn't suspect it at all - Nextcloud app, DAVx⁵ and Memories app (along with all other non-Nextcloud related apps) work without a hitch. Also in my setup it was easier to put mitmproxy behind it.
But when I sent the request manually using wget I noticed an additional Vary: Accept-Encoding header in the response.
It came from Traefik's compress middleware, so as a debugging step I disabled it and then I was able to log-in to the Notes app, and edit and sync the notes.
When I enable it back, everything breaks again.

Again - I'm still not sure what is happening as when I store the response from wget both with and without the middleware (whatever the value of Accept-Encoding header is too, except for it being either compressed or not) they are exactly the same, down to their hash, but maybe I'll just have to capture the traffic between Traefik and my device somehow to see the problem clearly.

Thank you again.

Oh and I'm not sure what you meant by the beta version, in the Nextcloud app on the bottom of settings it says

Nexctloud Android app
version 3.34.0

And I can see the option to join beta in Play Store, so it seems that I'm using the stable version.