Crashlytics could not parse the Android Project structure

I've had the same error after restructuring the resources of my flavors.

You have to make sure that every flavor has a res folder inside it. Even if the flavor has no own resources. After adding some empty folders the build did succeed again.

Example:

/App
  /src
    /flavor1
       /res <--
    /flavor1Release
       /res <--
    /flavor2
       /res <--
    /main
       /res <--

The solution for me was this:

1. To hard code the fabric key in the AndroidManifest.xml rather than referencing it as a string in the strings.xml file.
2. To add an empty "res" folder inside my "main" folder.