Are there some mods that dont work in multi player, kuz wenever i try to play Olympic mods with my friends it wont work, it only works randomly for some reason, is there a way to fix it if its a glitch?

There are a few mods that dont work on custom servers for some reason, though they do work in static servers.

To be honest I dont know if there's been any fix to it yet, I think the guys are working on it.