Type of Issue/Feedback:
I am also receiving this error. Launcher is black and after a minute the error pops up with an address for frontier.ffxiv.com. I can't access any of FF14's websites. I had to use my phone to reply to the thread.

Name of your Internet Service Provider (ISP): Frontier
State/Country: Oregon/US
Date/Time: was able to get on at 7am but I logged out at 8am. When I tried to log in around 5:30 - 6:30 I received the error and could not continue.

Frequency: Each attempt.

I receive responses from traceroute until hop 9. Last responsive IP is 198.32.176.137 at hop 8.