I am making my interiors available as modders resources. Please feel free to use them.
For some reason the file "INT_Col_Gray_D.dds" file, which darkens the aluminium textures, makes any skin equipped with it crash the showroom when loading it directly. A workaround is to load another skin in the showroom then navigate to the one with darker aluminium textures.
No problem when loading in game for a race though
Otherwise, you can simply delete that file. The aluminium will have its default texture but the showroom won't crash when loading the skin directly.