Like the title says. I use Google Chrome as my main browser, but since a week or so I can't log in to my account at all. I can't login to the Lodestone, Account Management, or Mog Station. Every time I try I get this message:

A technical issue has occurred.
Try accessing the site again. If the issue still has not been resolved, please contact the SQUARE ENIX Support Center.

Yet I can log in using another browser like Micorsoft Edge (which I am doing now).

Now I have had a friend over at my place, and he's logged into his account to play on my PC. Could that have anything to do with it? (I doubt it, but you never know)

I'm confused, please help!