Can only view the material in eevee but they are purple like the files are missing in cycles render
try going to file>>external data>>find missing files.
doesnt work, the files arent missing it just looks like tht in cycles
Check and see if you are applying the materials to the Higher LOD…from the screenshot, it looks like you MIGHT? have at least two LOD’S and if applied to the lower poly the Higher Poly will cover it and the textures will not be seen…Just a wild guess without the blend file to check…