Crashes in background and when started: `java.lang.IllegalStateException: metadata is null!` in `SynchronizeFolderOperation`

[rugk]

Cause of error

Exception in thread "Syncfolder thread" java.lang.IllegalStateException: metadata is null!
    at com.owncloud.android.operations.SynchronizeFolderOperation.synchronizeData(SynchronizeFolderOperation.java:276)
    at com.owncloud.android.operations.SynchronizeFolderOperation.fetchAndSyncRemoteFolder(SynchronizeFolderOperation.java:206)
    at com.owncloud.android.operations.SynchronizeFolderOperation.run(SynchronizeFolderOperation.java:132)
    at com.owncloud.android.lib.common.operations.RemoteOperation.execute(RemoteOperation.java:193)
    at com.owncloud.android.services.SyncFolderHandler.doOperation(SyncFolderHandler.java:106)
    at com.owncloud.android.services.SyncFolderHandler.handleMessage(SyncFolderHandler.java:79)
    at android.os.Handler.dispatchMessage(Handler.java:107)
    at android.os.Looper.loopOnce(Looper.java:232)
    at android.os.Looper.loop(Looper.java:317)
    at android.os.HandlerThread.run(HandlerThread.java:85)

App information

• ID: com.nextcloud.client
• Version: 30300490
• Build flavor: generic

Device information

• Brand: Fairphone
• Device: FP4
• Model: FP4
• Id: AP2A.240905.003
• Product: FP4eea

Firmware

• SDK: 34
• Release: 14
• Incremental: 24512012

Device: Fairphone 4 (FP4)
OS: Android 14, CalyxOS 5.12.1
source: F-Droid
Build-ID: AP2A.240905.003.24512012

[joshtrichards]

This is E2EE related. What's the meta.data version of the folder being accessed?

See nextcloud/end_to_end_encryption#802 (comment) for an example.

Are you getting a NotFoundException in your Server log?

Related: #13646, #12704

And I suspect this: nextcloud/end_to_end_encryption#802