Here I have used FirebaseMessagingService in Kotlin but when I run the project it will give me the following error:
Class 'MyFirebaseMessagingService' is not abstract and does not implement abstract base class member public abstract fun zzd(p0: Intent!): Unit defined in com.google.firebase.messaging.FirebaseMessagingService
If you aren't using any other play services then upgrade your firebase version to
if you are, downgrading to
12.0.1 will work.
Make sure to stick to play service
3.3.0 will still crash firebase-config.