How to solve Firebase API initialization failure (Android + Firebase)

Question

I recently needed to use Google GCM in my project. From its website it is said:

Firebase Cloud Messaging (FCM) is the new version of GCM. It inherits

Answer 1

In my case, the problem occurs because i had put "apply plugin: 'com.google.gms.google-services'" inside the dependencies of the modules build.grandle insteand of putting it at the end of the file.