I was using Admob and it was building the game fine but when I Imported the firebase plugin it give the following error: WARNING: The option setting 'android.enableR8=false' is deprecated. It will be removed in version 5.0 of the Android Gradle plugin. You will no longer be able to disable R8 I also encountered this error when I tried to implement a leaderboard when google admob and firebase was already there, in another project. I have tried nearly all solutions in this regard, but nothing works for me. Such as using this solution http://answers.unity.com/answers/1859781/view.htmlhttp://answers.unity.com/answers/1859781/view.html I need help with this.