Getting Exception java.lang.NoClassDefFoundError: com.google.firebase.FirebaseOptions after updating to the new firebase

Question

I have updated my application to the new firebase using the this and now when i compile my project i get the following exception.

Here is my logcat:

Answer 1

Before doing all those hectic solutions, try to Clean Project or Rebuild Project from Android Studio.

java.lang. NoClassDefFoundError

Exceptions is thrown when you change any Class name in your project but it couldn't get the changes you made in Runtime.