Android Push Notifications Crashes App

[harrisKAsher]

I am pretty sure this isn't a bug, but me missing something and I have no idea what. This use to all work just fine until the current update, we were preparing to deploy and then we found this.

Whenever we call PushNotifications.register(); our Android App crashes. This doesn't seem to be effecting iOS.

This is the error I get when it crashes:

E/Capacitor: Serious error executing plugin
    java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at com.getcapacitor.PluginHandle.invoke(PluginHandle.java:99)
        at com.getcapacitor.Bridge$1.run(Bridge.java:542)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:154)
        at android.os.HandlerThread.run(HandlerThread.java:61)
     Caused by: java.lang.IllegalStateException: Method addObserver must be called on the main thread
        at androidx.lifecycle.LifecycleRegistry.enforceMainThreadIfNeeded(LifecycleRegistry.java:317)
        at androidx.lifecycle.LifecycleRegistry.addObserver(LifecycleRegistry.java:172)
        at androidx.fragment.app.Fragment.initLifecycle(Fragment.java:471)
        at androidx.fragment.app.Fragment.<init>(Fragment.java:451)
        at com.google.android.gms.common.api.internal.zzc.<init>(Unknown Source)
        at com.google.android.gms.common.api.internal.zzc.zza(Unknown Source)
        at com.google.android.gms.common.api.internal.LifecycleCallback.getFragment(Unknown Source)
        at com.google.android.gms.common.api.internal.LifecycleCallback.getFragment(Unknown Source)
        at com.google.android.gms.tasks.zzu$zza.zza(Unknown Source)
        at com.google.android.gms.tasks.zzu.addOnSuccessListener(Unknown Source)
        at com.getcapacitor.plugin.PushNotifications.register(PushNotifications.java:83)
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.getcapacitor.PluginHandle.invoke(PluginHandle.java:99) 
        at com.getcapacitor.Bridge$1.run(Bridge.java:542) 
        at android.os.Handler.handleCallback(Handler.java:751) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:154) 
        at android.os.HandlerThread.run(HandlerThread.java:61) 
V/Capacitor/PushNotifications: Notifying listeners for event registration
E/AndroidRuntime: FATAL EXCEPTION: CapacitorPlugins
    Process: app.familytools.twa, PID: 27297
    java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at com.getcapacitor.Bridge$1.run(Bridge.java:551)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:154)
        at android.os.HandlerThread.run(HandlerThread.java:61)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at com.getcapacitor.PluginHandle.invoke(PluginHandle.java:99)
        at com.getcapacitor.Bridge$1.run(Bridge.java:542)
        at android.os.Handler.handleCallback(Handler.java:751) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:154) 
        at android.os.HandlerThread.run(HandlerThread.java:61) 
     Caused by: java.lang.IllegalStateException: Method addObserver must be called on the main thread
        at androidx.lifecycle.LifecycleRegistry.enforceMainThreadIfNeeded(LifecycleRegistry.java:317)
        at androidx.lifecycle.LifecycleRegistry.addObserver(LifecycleRegistry.java:172)
        at androidx.fragment.app.Fragment.initLifecycle(Fragment.java:471)
        at androidx.fragment.app.Fragment.<init>(Fragment.java:451)
        at com.google.android.gms.common.api.internal.zzc.<init>(Unknown Source)
        at com.google.android.gms.common.api.internal.zzc.zza(Unknown Source)
        at com.google.android.gms.common.api.internal.LifecycleCallback.getFragment(Unknown Source)
        at com.google.android.gms.common.api.internal.LifecycleCallback.getFragment(Unknown Source)
        at com.google.android.gms.tasks.zzu$zza.zza(Unknown Source)
        at com.google.android.gms.tasks.zzu.addOnSuccessListener(Unknown Source)
        at com.getcapacitor.plugin.PushNotifications.register(PushNotifications.java:83)
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.getcapacitor.PluginHandle.invoke(PluginHandle.java:99) 
        at com.getcapacitor.Bridge$1.run(Bridge.java:542) 
        at android.os.Handler.handleCallback(Handler.java:751) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:154) 
        at android.os.HandlerThread.run(HandlerThread.java:61) 

I have no idea what is causing this, I've gone as far as completely rebuilding the android app from scratch and it still happens. I am using NuxtJS, this update more or less change the entire code as I was adding Dark Mode. I also upgraded firebase in this update, but from what I understand PushNotifications.register(); is purely a Capacitor thing and is not related to firebase, though I could be wrong.

Anyway as stated I was using PushNotifications.register(); just fine before this update on Android. The google-services.json file appears to be in the right place (/android/app/) and is where it was before so I got no idea what is causing the problem. Any idea to explore would be appreciated, I am running out of them.

Edit:

💊   Capacitor Doctor  💊 

Latest Dependencies:

  @capacitor/cli: 2.4.7
  @capacitor/core: 2.4.7
  @capacitor/android: 2.4.7
  @capacitor/electron: 2.4.7
  @capacitor/ios: 2.4.7

Installed Dependencies:

  @capacitor/cli 2.4.7
  @capacitor/ios 2.4.7
  @capacitor/core 2.4.7
  @capacitor/android 2.4.7
  @capacitor/electron not installed

[harrisKAsher]

I've figured it out. I have no idea why this is causing this bug or where to post the bug, but it is a bug unless it has something to do with the plugin cordova-plugin-purchases if it is on 2.0.0 or greater it causes it. Maybe 2.0.0 or later is for Capacitor 3 but I don't see a place in the plugin where it says that is for Capacitor 3. Changing it back to 1.3.2 has fixed the problem for me.