Crashlytics not working after update Android Studio to 3.3

Question

So also gradle plugin updated to 3.3 and Gradle updated to 4.10. After that, Crashlytics stopped working with error:

Crashlytics found an invalid API key: null

Any ideas? I am forced to revert Gradle to make it working again. Crashlytics configured with Firebase

Answer 1

Updating com.google.gms:google-services to 4.2.0 helped me

Answer 2

Updating

distributionUrl=https://services.gradle.org/distributions/gradle-4.10.2-all.zip

that helped me on gradle-wrapper.properties