i think the problem is if you play press play with the server settings as 53640 and localhost it wont connect you to any server
you need to create one first by pressing servers at the bottom right
leave host port and and server ip address alone i guess
and if you create server, you should load into a studio game with the map you selected
if you actually wanna play go back to the novetus menu and press play on the map you selected (make sure the join server ip (localhost) and join port (53640) are the same as you put into host options though)
and from there on you can play and chat and such without having to use play solo (i just set max players to 1)
thats just how i do it though
if you wanna play with friends i dont know dude heres a link to a youtube video
(sorrry if nothing works or you dont understand what i said, not good at explaining much)