Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi,

I got a message saying my account has been banned.

Maybe it has to do with an issue this afternoon:

I was getting a connection error, but only with my account. For testing purposes, I created a new account to see if the error persisted.
I guess it's forbidden to have multiple accounts, but didn't think of that until I saw the banned message.

I can login into the webpage (with both accounts), but not into the game.

Any help is appreciated.

Thank you.

Character is named Relianth on the PvP server