As of the 0.20.0 update, Facebook login is no longer available.

If you previously logged in with your Facebook account and have not linked with an alternative method, you will be prompted to register with a new login method. This is so that you can continue to use your account across devices, retain your progress after reinstalling the app, and maintain the ability to recover your account if needed.

When you log into your game, you may continue to see this prompt. Alternatively, you may be able to update your login method in the game’s Settings.

Important: If you do not enter a new login method, you will lose the ability to recover your account if you are switching devices or reinstalling the app. In this case, please contact our Support Team for assistance.