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 observed this happening when more than one Xcode app installed.

To fix this,

1. Launch Xcode and click preference..,
2. Go to "Location" Tab, Select correct options from "Command Line Tools" dropdown
3. Quit Xcode and relaunch it.
4. Run your app.