Server Error - Sign in timeout

I had similar problem, and despite resolving it initially it keeps reoccuring almost daily. Well, kept to, because now I’m simply locked out of the game behind this message, and none of suggested methods (including this thread ones) worked for me. I think server-side resets made the problem disappear for a while, but now it’s not the case. I guess we’ll have to wait for better troubleshooting methodics or a server-side fix.