React-Native productFlavors (Error type 3: Activity class does not exist)

Question

I want to use 2 productFlavors for my Android App: live and staging.

In app/build.grandle I defined them like this: <

Answer 1

Add the --appId on run command, so the react native will know where to find the Main Activity:

react-native run-android --variant=stagingDebug --appId com.some.id.staging