Textures missing on a specific model

I have Left 4 Dead and Left 4 Dead 2 mounted into GMOD and for almost no reason, Louis is untextured. But it’s not just that, he’s invisible. He spawns, there is a shadow and I can walk into him. But there’s not even pink and black colors. I can’t color, material, or skinswitch it. How do I fix it? The Left 4 Dead folders don’t have any materials for Louis and there’s only an NCF file in my SteamApps folder which I can’t extract anything out of (not that the materials are there.) I can also spawn any other survivor just fine.

Just an error with the mount. Have you tried un-mounting, launching L4D, exiting, and re-mounting?