Been having the same problem for the past 3 weeks, the game boots, but I'm unable to get to the character select screen.

Square Enix customer support is absolutely useless on the issue, I've created 4 different tickets, all of which have been closed and was told to remake them! Reinstalled multiple times, reformatted my machine with nothing but FFXIV on it, and still the same problems. Other MMOs / games work perfectly.

Almost lost an entire months subscription, what a waste of money this game is turning out to be.