iOS - Troubleshooting.   
If you are having trouble with the app and have an iOs device please follow these steps.
  1. Force close the app.
  2. Restart your device.
  3. Update the app.
  4. Check your internet connection.
  5. Check how much free space is left on your device. You must have at least 2GB available to run the game smoothly.
If none of this worked please report your issue.