After buying the mecha arm right and arm blades pack, I keep getting this error, I cant enter any games without disconecting.
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I can actually play the game now, but I still get the error if I try using /rec.

Check your firewall and make sure it is allowing Toribash.

Here's a tutorial on how to allow game/program through firewall in case you aren't sure: https://www.computerhope.com/issues/ch001324.htm

Works now

Alright that's good, I'll close this thread then. If you got further questions or difficulties feel free to re-open it.