Build failed when adding FCM pluggin

II can’t build my android APk,after installing the FCM plugin
it shows:

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED

Total time: 5.563 secs
Error: cmd: Command failed with exit code 1 Error output:
FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':processDebugGoogleServices'.
> Please fix the version conflict either by updating the version of the google-services plugin (information about the latest version is available at https://bintray.com/android/android-
tools/com.google.gms.google-services/) or updating the version of com.google.android.gms to 9.0.0.

* Try:
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