Error: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference

[aprilmintacpineda]

Report

• I have searched existing issues and this is not a duplicate.

Environment

• Platforms: Android

• Android version: 10

• iOS version: N/A

Issues and Steps to Reproduce

I have not tested this on iOS, but on android, whenever I tap on Register, the following error gets logged:

Error: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference

Note that I am running the code I got from https://github.com/CatalystCode/react-native-azurenotificationhub/blob/master/docs/android-installation.md#javascript-configuration and only changed the connectionString and hubName to their correct values. The error is vague and I'm unsure what it's referring to...

Expected Behavior

The error shouldn't be thrown.

Actual Behavior

The error is thrown.

Link to Code

N/A

[aprilmintacpineda]

this happens on the register call, the register is successful, but the _onAzureNotificationHubRegistrationError logs with that error afterwards.

[aprilmintacpineda]

Here's the whole log from Android studio:

E/ReactNativeRegistration: Failed to complete token refresh
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
        at java.net.URI$Parser.parse(URI.java:3086)
        at java.net.URI.<init>(URI.java:583)
        at java.net.URI.create(URI.java:845)
        at com.microsoft.windowsazure.messaging.Connection.executeRequest(Connection.java:147)
        at com.microsoft.windowsazure.messaging.Connection.executeRequest(Connection.java:132)
        at com.microsoft.windowsazure.messaging.NotificationHub.refreshRegistrationInformation(NotificationHub.java:297)
        at com.microsoft.windowsazure.messaging.NotificationHub.registerInternal(NotificationHub.java:391)
        at com.microsoft.windowsazure.messaging.NotificationHub.register(NotificationHub.java:144)
        at com.azure.reactnative.notificationhub.ReactNativeRegistrationIntentService$1.onSuccess(ReactNativeRegistrationIntentService.java:73)
        at com.azure.reactnative.notificationhub.ReactNativeRegistrationIntentService$1.onSuccess(ReactNativeRegistrationIntentService.java:53)
        at com.google.android.gms.tasks.zzn.run(Unknown Source:4)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:764)