IO Error: Error #2031

Hey, i'm using club599's source and i've set it up properly but when i try connect to server it gives me IO Error: Error #2031 Any help?

Well you clearly haven't set it up properly... There are plenty of tutorials, just go back over it making sure you have done each step accurately and with precision.

I edited server DNS and client port/ip to my hamachi server(and ofc upload .sql to localhost), that's all that it said to do in tutorial, does anyone know what the error means atleast?