I am trying to distribute Android beta builds via fabric following https://docs.fabric.io/android/beta/gradle.html.
After running gradle assembleRelease crashlyticsUploadDistributionRelease
, the build was successfully uploaded to fabric, but the problem is that nobody was invited for testing. Any settings I am missing here?

And this is my setting in the gradle file:
ext.enableCrashlytics = true
ext.betaDistributionReleaseNotes="Hello World"
ext.betaDistributionEmails="yzhong@gmail.com"