Session 'app': Error Launching activity

Question

After the Android Studio 2.0 update while the gradle build finishes I get this :

Session \'app\': Error Launching activity .

It prevents the app from starting

Answer 1

None of the existing answers helped me as I had the same app installed in my other profile. Solution -

1. Switch to the other profile
2. Uninstall the app from 2nd profile
3. Switch back