crashlytics android studio gradle build failed

Question

I have installed crashlytics plugin to android studio 0.9.3; after this I added to my project; It added lines to gradle, first activity and so on...; after this build fails with

Answer 1

I just had the exact same issue after replacing the API Key in the AndroidManifest.xml file by a string reference instead of a literal string.
Using the literal string, the error disappeared.

Use

Don't use