Agnanzo

I don't know why I get these "Spoilers .dff is missing","Roofs .dff is missing" errors if i replaced and installed everything correctly, could you shed some light M4K3? Also some things have textures but others are white only.
I don't know if it's intentional because if I keep pressing the right or left arrows some new parts do appear, maybe the "Spoilers .dff" is only a way to categorize things?