[Updated: May 17]

The Facebook login issue has been addressed.

Players who use Facebook as their main access to Sky should be able to log in normally.

Thank you for your patience.
We are currently investigating an issue preventing players from accessing Sky through Facebook login. 
Please note that players should still be able to access Sky through other login means.

We'll be extending the current Traveling Spirit's visit so that affected players get a chance to see them.