Cannot create a proxy class for abstract class 'GoogleServicesTask'. with 'com.google.gms:google-services:4.3.4'
I got this issue right after Google release
It is working again for me just by reducing the version to 4.3.3.
Better update these hopelessly outdated build tools:
to the current version (matching the Android Studio version):
I was having same issue when I updated one of our old project. what worked for me is I downgraded these two dependencies to