I'm getting the usual pink and black squares you would get for a missing texture, I think it may be the sheen of the eye. I have uninstalled both GMod and PPM and it did not fix the issue. Does anyone know how to fix this? Below is a copy of the supposable error message and a link to a picture showing the issue.

(Eyes are supposed to be completely red)
Picture: http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=800969495

Error:
Requesting texture value from var "$basetexture" which is not a texture value (material: models/ppm/base/eye_l)
Requesting texture value from var "$basetexture" which is not a texture value (material: models/ppm/base/eye_r)
Requesting texture value from var "$basetexture" which is not a texture value (material: models/ppm/base/eye_l)
Requesting texture value from var "$basetexture" which is not a texture value (material: models/ppm/base/eye_r)