Simulator session timed out

One of my friends asked me for helping her with this issue when running simulator:

Session could not be started: Error Domain=DTiPhoneSimulatorErrorDomain Code=2 "Simulator session timed out." UserInfo=0x7f8b62c0c660 {NSLocalizedDescription=Simulator session timed out.}
Error: /XXX/XXX/XXXXX/platforms/ios/cordova/run: Command failed with exit code 1
    at ChildProcess.whenDone (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/src/cordova/superspawn.js:135:23)
    at ChildProcess.emit (events.js:98:17)
    at maybeClose (child_process.js:756:16)
    at Process.ChildProcess._handle.onexit (child_process.js:823:5)

A quick google takes me to here, and none of the solutions there works.

A few facts:

1. It is an ionic project
2. Simulator works in xcode
3. ionic emulate ios and ionic run ios both return that error
4. ionic platform add ios was run as root.

Solution:

1. Remove the platform. ionic platform rm ios
2. Open a new terminal window(which will run as current user)
3. Add the platform ionic platform add ios
4. Run the project.ionic run ios

Other possible issues:

1. When I try to run ionic platform add ios, it fails when using a non-root user. I have to remove the npm_cache folder at ~/.cordova/lib/.

Happy hybriding!