Rust crashes upload load


My friend is experiencing some issues with Rust, he can load the game find, but when it joins a server and it finishes “Receiving data”, the screen goes black and completely crashes and gets an error saying “Out of memory” when he still has loads of free memory? He has tried to Verifying game cache, restarting steam/pc, reinstalling the game, reinstalling the game with Anti Virus disabled and Ran the game as administrator. He has tried everything, but we have no clue how to fix it?