What is the request installation procedure?

[hugoh59]

I get:

"Installing build/Build/Products/Debug-iphonesimulator/ReactNativeRailsAuth.app
An error was encountered processing the command (domain=NSPOSIXErrorDomain, code=2):
Failed to install the requested application
An application bundle was not found at the provided path.
Provide a valid path to the desired application bundle."

When trying to launch react-native run-ios