Hypixel Skyblock Error?

As soon as I try to join hypixel.net on the server, everything is normal. But when I try to enter the Skyblock game mode, I get the following message: Internal Exception: java.io.IOException: An existing connection was canceled under software control by the host computer. (Picture attached)

I updated my Java and reinstalled Minecraft, tried other versions, etc. The Hypixel Help Center has not answered me for 4 days. I have complete access to the server. Just not on Skyblock!

It looks like you got banned from skyblock

That can't be, I can access it anywhere else.

How do you mean anywhere else

On ANY other part of the server

If so I would be completely banned. I can still play Bedwars on the server.

Yes you can only be banned in parts from the server as maybe in this case only from skyblock

I only now noticed that you are using a modified client, this may be because watchdog probably recognizes this and kicks you

Try to join with a completely normal client / launcher