Meowch! Sorry to hear that, but don't worry. We know what to do.
 
no-wi-fi

Please check your Internet connection. It should be perfect for the app to run correctly.
Resetting your WiFi router can fix the issue.
 
1. Force close the app ( iOS |  Android | Windows )
2. Turn your device off;
3. Turn your device on by holding the power button;
4. Start the game to see if it works again.

Usually, it helps, but please don't hesitate to contact us via the Support button if the issue persists.