This problem started on Monday morning on both worlds I'm playing - zz1 and en1. I've never had this problem before. It seems to be fixed on zz1 since Tuesday (only 24 hours without access) whereas en1 is still not working. The last time I successfully loaded game on en1 was Sunday (just before midnight). Since that time I've loaded game 0 times.
It's a very serious problem, why it's moved to next update? If user's ranking showed user's passwords and mails, would you wait for next update to fix it? Or would you patch it ASAP?
The problem comes, and goes for a lot of players at the moment. I was one of the first to have this happen, and after about three days, I have not had a problem since, but then it just hits a different person, and messes with them for a little while, and moves on to the next, lol. The devs will fix it as quick as possible, but for now, we shall play Russian Roulette with the server, lol.
I am positive the devs are working as hard as they can to fix the problem, and will fix it with an update as soon as they find a solution, it takes some time, and I know it is extremely frustrating. This type thing does happen when a game is going through a lot of changes, they have to chase bugs constantly, and go through an elimination process to find a small error that causes bad things to happen.