Issues playing on server

[g0dz1lla]

Over the past two days i was playing on a server just like normal, but since yesterday after i turned it off when i am trying to join the game it says i cannot join any team for example if i try and join the alien team (in spectator mode) "you cannot leave the alien team since the build timer hasn't finished" and with the human team it says i cannot build in this blocked area even though again i am out of the game already Need help please

[Undeference]

Either the server is using a mod you don't have or you are using a server that does not have sv_pure = 1 and are loading a bad mod.