Facebook login error . Windows 11

I think the only solution for now is to download the Windows 11 app and log in with a King account instead of Facebook.

Hello @cryyyk I have read that you can synchronise your account between devices and platforms, but it is not something I have tried myself. Also, please note that it isn't true synchronisation as only your levels and gold bars are the same across devices and platforms. Your boosters and progress in features and events don't follow you from device to device. Additionally just because you have a certain feature on your device at the moment (for example the Power Pop) synchronisation doesn't guarantee that you will keep that feature.

Here is an article on how to synchronise your account.