So i was tryna join the server mc.roleplayhub.net for the first time but when i saw the ping thing on the side that shows u ur ping it said "Wrong Version Velocity 1.7.10 smthin - 1.20.6" and i was in 1.20.4 (Fabric) so uh why cant i join?

I’ve tried to join a server but it says it’s not to be found, i would love some help