This problem started after the 1.2gb patch that came out the week 13.10 - 19.10. I don't know what version that patch made the game, sorry for limited information.

We are a clan that play often and we have a veriaty of servers. We do use some mods that i will list here : ACRE, Jayarmalib and CBA.
Now, our main servers that we use will not load maps.
I've tried all the maps that are native with the server and with maps that have been uploaded. When i log onto the server i come into the "host" screen (i think its called) Where you choose maps, missions and difficulity. When i then choose a map i get to the "vote screen". I sit and wait for the timer and when it reaches zero nothing happens OR it loads the map, goes to lobby where you choose role and when you press okey after chooseing role you get kicked out and if you look at the server status no map has been hosted.

These 2 results depends on what mission you want to host but i can't see a connection. It doesnt matter if it is a vanilla map or a custom map, both kinds get both results.

I've heard that deleting your game cache and un-subscribing to items in the steam shop would work but non of those things have fixed the problem.

We have tried with several PC's. With and without our mods.