Application Installation Failed in Android Studio

Question

Yesterday my app was running perfect from Android Studio but today when I started working on my app and running it i am getting error message continuously

Answer 1

In my case, it was very a silly and funny mistake. I, accidentally without actually knowing, checked "Android Debug Bridge, Use libUsb backend". Actually it should stay unchecked..

In Mac Pro, Go Preferences - > Build, Execution,Deployment -> Debugger.