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
I have solved the issue. I had long conversation with crashlytics team, but they didn't helped me.
My solution is to create separate project, and install crashlytics on that project. It will generate api key on that project. I just copied that key and pasted to my original project and it worked. Have no idea why it didn't generated the key on my initial project.