HELP! Most models show as errors in demos - DRIVING ME CRAZY

Hey guys, i make videos and my latest one is a gmod one.

Long story short, while playing on all the servers i downloaded all the models, they worked fine ingame
But in the demos they come up as Error signs

I’ve tried downloading all the cop models and everything from workshop but still no luck

PLEASE, PLEASEEEE tell me what the hell im doing wrong