The Task.leftShift(Closure) method has been deprecated and is scheduled to be removed in Gradle 5.0. Please use Task.doLast(Action) instead.

FAILURE: Build failed with an exception.

* What went wrong:
Task 'firebaseUploadReleaseProguardMapping' not found in project ':app'.

* Try:
Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 0.746 secs