hopefully im not to late but if you are still crashing i might have a solution

try deleting and then reinstalling both the game and the mod

try verifying the game cache

if these dont work check your pc specs and see the minimum requirements for the game

i hope this helps in some way

you need to install the multiplayer dlc, only this one and not the multiplayer dlc trial pack

引用自 loca qlia：

you need to install the multiplayer dlc, only this one and not the multiplayer dlc trial pack

Which DLC?

Omg y’all I figured this out ages ago, I was trying to play a custom zombies map that had a custom weapon pool AND I was trying to run a separate weapon mod on top of that, the overlapping is what caused the issue, hope this helps others LMAO