Having issues with textures in gmod

I’ve recently ported my OC to Garry’s Mod and everything is fine except for the textures. I have this (I think common) issue where I get an error stating: “Requesting texture value from var “$basetexture” which is not a texture value (material: pp/copy)”

This is what the .vmt file looks like:

“$basetexture” “models/player/Adam/AdamModel.vtf”
“$translucent” 1

I’ve tried quite a few things like putting a capital “L” in the vertexlitgeneric, added the .vtf to the end of the $basetexture line and yet I’m still struggling with the textures. (This is what my model looks like in game if anyone is wondering - ragdoll and pm)

Any ideas as to how I can fix this issue?