I got this error for 3 hrs this afternoon, completely unable to log in my main character that was stuck in the Telvanni Peninsula. All other characters could log in..
On a whim, I decided to turn off all addons for that char and see.. and lo! She logged right in like the rest of my chars.
So I took her home.
Even though I have updated Minion, restarted my PC, etc.. and while all other characters are playing with addons, that one was a bugged char.
/Shrug.
Will try suspending addons and see how it goes. Thanks for the tip!