Android Firebase DynamiteModule: Failed to load module descriptor

Since upgrading to the newest version of Firebase (9.0.0), I can't get rid of the following two errors when authenticating a user through signInWithEmailAndPassword(). Does anyone have an idea what's going on?

    05-19 18:09:49.245 23550-23589/[PACKAGE] E/DynamiteModule: Failed to load 
    module descriptor class: Didn't find class 
    "com.google.android.gms.dynamite.descriptors.com.google.firebase.auth.ModuleDescriptor" 
on path: DexPathList[[zip file 
"/data/app/[PACKAGE]-3/base.apk"],nativeLibraryDirectories=
[/data/app/[PACKAGE]-3/lib/x86, /vendor/lib, /system/lib]]

And

    05-19 18:09:49.252 23550-23550/[PACKAGE] E/FirebaseApp: Firebase API 
initialization failure.java.lang.reflect.InvocationTargetException

      at java.lang.reflect.Method.invoke(Native Method)
      at com.google.firebase.FirebaseApp.zza(Unknown Source)
      at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
      at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
      at com.google.firebase.FirebaseApp.zzbu(Unknown Source)
      at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source)
      at android.content.ContentProvider.attachInfo(ContentProvider.java:1748)
      at android.content.ContentProvider.attachInfo(ContentProvider.java:1723)
      at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)

(...)    
Caused by: java.lang.IncompatibleClassChangeError: The method 'java.io.File android.support.v4.content.ContextCompat.getNoBackupFilesDir(android.content.Context)' was expected to be of type virtual but instead was found to be of type direct (declaration of 'com.google.firebase.iid.zzg' appears in /data/data/[PACKAGE]/files/instant-run/dex/slice-com.google.firebase-firebase-iid-9.0.0_95503dc60ed409569d1585da411de93e6c633bf7-classes.dex)
      at com.google.firebase.iid.zzg.zzeC(Unknown Source)
      at com.google.firebase.iid.zzg.<init>(Unknown Source)
      at com.google.firebase.iid.zzg.<init>(Unknown Source)
      at com.google.firebase.iid.zzd.zzb(Unknown Source)
      at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
      at java.lang.reflect.Method.invoke(Native Method) 
      at com.google.firebase.FirebaseApp.zza(Unknown Source) 
      at com.google.firebase.FirebaseApp.initializeApp(Unknown Source) 
      at com.google.firebase.FirebaseApp.initializeApp(Unknown Source) 
      at com.google.firebase.FirebaseApp.zzbu(Unknown Source)  
      at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source) 
      at android.content.ContentProvider.attachInfo(ContentProvider.java:1748) 
      at android.content.ContentProvider.attachInfo(ContentProvider.java:1723) 
      at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source) 

(...)

Solution 1:

I had the same problem and I found a mistake done by me in my Firebase console.

One of the reason for this problem could be, your Sign In Method inside Firebase > Auth Dashboard might be disabled.

I just enabled it and it started working.

Solution 2:

Can you check your Google Play Services version?

From Firebase oficial website:

Prerequisites

• An Android device running Google Play services 9.0.0 or later
• The Google Play services SDK from the Android SDK Manager
• Android Studio 1.5 or higher
• An Android Studio project and its package name.

Solution 3:

Very sad that Firebase initialization errors are so not straightforward, so developers need to guess what went wrong. In my case I imported only:

compile 'com.google.firebase:firebase-auth:10.2.0'

and forgot to import also core:

compile 'com.google.firebase:firebase-core:10.2.0'

Maybe it will help someone, good luck!