App crash after interegrating firebase authentication in my app My app crashes on starting it (basically any activity with firebase code) after adding firebase authentication This is the logcat 2022-07-14 20:17:21.538 15482-15482/com.example.flimer E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.flimer, PID: 15482 java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.flimer/com.example.flimer.SignUp}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.pm.ApplicationInfo...