I cannot find any help online regarding this error and every time I fill out the form online to contact support it tells me I've missed something even though I've filled everything out correctly, it just does not seem to work.

Every time I log into POL, I get this error and nothing I've tried to do seems to fix it.
I was using a week USB wireless adapter after relocating the PC and thought that might be the problem, (I used to play on this PC on a wired connection). So, last night I got a wireless card and installed it and tried to log into POL again and still got this error. I tried my standard network (2.4ghz) and my HD network (5ghz) and it came up with the same error each time still.

It's interesting to me that the only things online I can find about this error are from 7 years ago... yet it's still referred to as an unknown error, lol.

I'm trying to get my old PC that I used to play on up and going again for my son who wants to play FFXI again (he played briefly a couple years ago) and his birthday is 3 days after the launch of the new expansion and I thought: what better time to get him back into the game?

Any help with this would be greatly appreciated!