Lua cache wont download via fast dl

Hey, i set up a fast dl for my server the other day and its working fine for everyone however a friend of mine joined the server and it wouldnt download the cache for him. It downloaded all the maps, textures etc but not the cache however the cache downloads fine for everyone else. We generated a new cache and it didnt download, even got the friend to reinstall his gmod to no success. Does anyone know what could be up? Thanks.

well you friend didnt need re-install Gmod for this, but. Did you upload the cache to the FastDL

Yes, like i said its working fine for everyone except him.

hm, tell him to check his settings “Allow Custom Content” or w/e in options

Its set to allow all custom content.