Please delete the app from your device and reinstall it by downloading it from the App Store.
If this does not resolve the issue, please contact us by using the technical support form which you can find in the support section of each game.
⚠︎ IMPORTANT ⚠︎
When you delete and reinstall the app your online user account will also be deleted. For this reason, please remember to write down your user name and password, so you can access your account after reinstalling the game.