Well this is certainly an odd problem! Usually if they disabled your account, there would be a note or something telling you why. But that 4001 error code makes it seem more like some random tech thing going wrong.
Have you tried logging in with a different browser or device yet? To make sure it isnt something on your end. If it keeps happening everywhere though, gotta be an issue their side.
I had the same thought when I first saw the thread. I know I have seen several people come to the forum to create scam accusation threads about their account being blocked/banned but never have I seen anyone mentioned getting a “4001 error” if indeed the account was banned for any reason I’m sure bcgame would have created a pop up notification for him to see each time he tries to log into his account and also sent him an email notifying him that his account was banned, I don’t think they’ll use a “4001 error” for this type of stuff.