NoClassDefFoundError: com.google.firebase.FirebaseOptions

Question

I keep on getting the NoClassDefFoundError on other test device (4.4.2) that I\'m using. But works fine on my test device (Android 5.1).

I tried the solutio

Answer 1

I have the same problem, with this I have solved:

https://stackoverflow.com/a/37364044

You must replace android:name=".app" with android:name="android.support.multidex.MultiDexApplication"