User Forbidden 4112 Error on KuCoin

I'm dealing with a really frustrating situation with the KuCoin exchange. I can't buy anything, sell my stuff, or take out any money. Instead, I keep seeing this confusing error message that says "User forbidden 4112". It's like the reliable mountain has fallen apart and everything is in chaos. This situation is really confusing and annoying. As a user, I just want things to work properly and not have any annoying problems. I trusted and invested my money with this exchange, but now I'm wondering why it's so difficult to access and manage my funds. KuCoin used to be a trustworthy platform, but it seems like they have let down their users.