I saw all other questions, but none of accepted answers is working for me.
By following integration steps found here https://dev.twitter.com/twitter-kit/android/int
Add the below line in app/build.gradle file
apply plugin: 'com.google.gms.google-services'
Clean The Project and Run.
Changing the below dependency at project build.gradle from :
classpath "com.google.gms:google-services:4.1.0"
to
classpath "com.google.gms:google-services:4.2.0"
has solved the problem for me.
If someone is using crashlytics with Android dynamic features module, make sure your fabric and google-services plugins are applied only in your app module. In my case that was the problem.