Hammer Editor | Some models have a black and purple checkerboard on them

[AveOriginals]

I have a big problem. I want to edit Rockford v4b but some models have a black and purple checkerboard on them. Also, I don't have some of the textures even though I decompiled the map and extracted the textures and models from it (I did the same with the content for the map).

Also I have a question, if in my hammer you can see the black and purple checkerboard on some models and I have errors on some models, after compiling the map and making it available on the workshop, if someone downloads the map and the content pack will not have these problems?​