title: Firebase Analytics - firebase-core:9.0.0 - FirebaseInstanceId: background sync failed: INVALID_SENDER
body: <p>I followed the instructions on the following page: <a href="https://firebase.google.com/docs/android/setup#add_firebase_to_your_app" rel="nofollow">https://firebase.google.com/docs/android/setup#add_firebase_to_your_app</a></p>
  
  <p>The initialization process works fine but I see the error message like mentioned in the title.</p>
  
  <p>Do you know what to do?</p>