I have the same issue. I cant log in anymore. It loads long time and then i get the same failure like Loupy. I did try it several time with some time between. Even deleting the cache etc. didnt work.
I have the same issue now. I was at the last step from the Event. Then I got an forced logout and now i have to start from the beginning...
And by the way, i have no access to Archievement, too.