Was playing game fine, headset got knocked and disbled sound from the game.

i restarted the game to get sound on and when i goto login the white login text boxes stay black and eventually the error message above appears.

I have:
flushed DNS,
ipconfig /release - ipconfig /renew
reset router 5 times already
restarted computer a whole bunch of times
deleted the FFXIV folder from my documents

Still getting the error.

Why has this just suddenly started happening? help on this is very limited and im not sure what to do from here.

thank you for your time