From what I am finding: http://frontier.ffxiv.com/arr_win/in...?rc_lang=en-us is a website that interacts with the launcher. If you go to this website directly, it should be a black screen. On mine PC it was. If it isn't and the site returns the error, then the launcher isn't able to reach the website and hence getting kicked back out.

Remedy: Gotta wait. Refresh the website. When it becomes a normal webpage, launch the launcher.