2. Check if your username and password are correct.
3. If you have the Facebook app installed on your device, log out of it (or delete and reinstall it).
4. Log out of your Facebook account in all browsers installed on your device (Chrome, Opera, Safari, etc.).
5. Restart your device and try to connect the game to Facebook again.
For iOS devices:
1. Go to thedevice Settings->Facebook.
2. Make sure the game is listed underAllow these apps to use your accountand that permission is turned on.
3. Delete your Facebook account from the device settings (tap your name -> tapDelete Account) and log in again.
For Android devices:
1. Go toSettings->Accounts.
3. Restart your device and try to connect the game to Facebook again.
If none of that works, try this:
1. Remove the game from thelist of applicationson Facebook.
2. Restart your device, enter the game, and try to reconnect it to Facebook.