I login, go through to the character selection screen, and when I try to enter game it sends me back to the login screen, so I have no clue what's going on. It just keeps doing this.
It's because the server is migrating to a new host, and it's in the process of it so it's not stable yet. Some people can log-in some can't yet, overall the server should be fully migrated and stable within the next 8 hours , give or take. That's the current situation right now.