Data Center Travel Issue

[AurisNix]

Had the same problem, saw in another post to delete the Final Fantasy XIV folder in Documents > My Games, I had to do it twice but it worked however that means deleting all your configuration, so do a backup copy before deleting it

Update: create a copy of FFXIV.cfg, then delete it and try login again, repeat until you manage to get into the game, the file will delete all your system and character configuration.
To restore: open your original copy of FFXIV.cfg with notepad and copy all the text that starts on Display Settings and below to the very end, DO NOT copy Network Settings or Version. Replace the text into the new FFXIV.cfg in Documents>My Games>Final Fantasy XIV