Invalid Device State - Xcode/iOS Simulator error

Question

Problem: I cannot simulate an Apple watch interface. Whenever I try and test my Apple watch app on the iPhone 6 simulator, Xcode successfully finishes and builds the app, at

Answer 1

I had the same issue. Generally it is because you just update Xcode or change its name in the Applications folder.

If you just restart your computer it will work correctly.

Hope it helps !