Can no longer get on a server

[Risvertasashi]

Were you kicked out while trying to enter an instance?

If so, you have to wait for the instance timer to expire before you can get back in. That said, 2 hours should be enough time for even the longest ones to expire... Right now is also peak time so that might be part of it.

edit: So I can't get in dungeons anymore either. I'm guessing things are breaking under peak load. Should be better in a few hours...