Heres the only reply I got from support:

"We really do apologize for the trouble and inconvenience you have been experiencing with the error code. At this time, the error code is being given when the server has reached capacity. Unfortunately we are unable to assist directly with resolving the error. We encourage you to try again at a later time."

A link to my thread in-game bugs:

http://forum.square-enix.com/ffxiv/t...since-the-24th