Invisible custom player model

[hipy]

Hey guys,

I added some custom models to my server for the pointshop. I extract them after they got downloaded from the workshop. I added models before and it all worked fine but this time it does not..
The models are invisible, in the shop and when you equip it(third person view).

There are no errors so I do think the models are loaded from my resource file. I already tried deleting my cache :/

Any suggestions? I searched but could not really find any solution on this problems.

Edit: to clarify: I added one model and tested it, worked fine. I then added 3 more and the problem started. Models I added months ago also became invisible(not all).
I then removed the 3 models again but it did not solve it for the model I added first.