Why ERROR

[nhayhoc]

I run:
npm i --save
cd RNMapboxARDemo
npm i --save
adb reverse tcp:8081 tcp:8081
react-native run-android --variant=gvrRelease
And Error:
The JavaCompile.setDependencyCacheDir() method has been deprecated and is scheduled to be removed in Gradle 4.0.
The TaskInputs.source(Object) method has been deprecated and is scheduled to be removed in Gradle 4.0. Please use TaskInputs.file(Object).skipWhenEmpty() instead.

FAILURE: Build failed with an exception.

• What went wrong:
  Task 'installGvrRelease' not found in root project 'RNMapboxARDemo'. Some candidates are: 'uninstallGvrRelease', 'uninstallOvrRelease'.
  Can you help me. thank you so much!

[JonForest]

If you follow https://facebook.github.io/react-native/docs/signed-apk-android.html you should get past this point.
At least, I just have. I've another error now, but it at least it's forward progress...

(for more info, this issue is similar facebook/react-native#16854 and the thing that led me to the above documentation)