Gmod Server: No-Collided Doors?

Hello,

ive been setting up a server the past few days, one day the doors on the server starts to no collide, not sure as to why ive investigateda bit and determined it has to be an addon given im almost 100% sure my server has css mounted. if anyone can provide assistance it would be most appreciated thanks!

Your server is missing the door model.

If the door model is from CS:S, your server is missing CS:S.