Skins turning green with no selffillum

When creating skins i load them in sandbox world models to see how they look, however recently all the parts that have selffillum by default in their vtms causing them to turn green have stayed green even when i remove the selffillum. my suspicion is that somehow my phcustomtexture folder/vmt stuff isnt linked as it should be so its relying on some other folder idk about for the vmts. does anybody know how to fix this or access where it is actually getting the vmts from?

please help this is very annoying and i dont wanna have to stop making skins because its geeked