I'm getting a model of a scifi gun to the SFM workshop, but when I try to upload it, it says "we cannot detect material in mod path materials/models/Optimus_Prime_Weapon_Pack/WEP_OptimusRifle_TEXTSET_Colors.vtf". The odd part is that the file is in fact in the mod path, but it can't find it for some reason. Same issue with another model, but the file it's looking for really isn't there. Any way to fix this, I would like to upload stuff into the workshop.