Unsolved "Failed to load diffuse/specular/normal map"

In the following picture, there is alot of errors about the textures. This error did not appear yesterday, when I made this car.

 

Check the materials.cs if there is anything spelt wrong from the .dds or other format files.

 

as i said, it was working yesterday but today it isnt working, even though i done nothing.

 

thanks, will do!

 

Hello, sorry for the bump but I'm having this problem once again, but this time I really need this fixed as I like the car I have now and I don't wanna redo the progress.
This time, it is not common but, it is empty.cdae

My vehicles folder in the documents are clear

There's only a cdae file in the cache's documentary

and there's no "empty.cdae" in the cache folder, is this the problem?

 

it is correct, I have no idea how this happened, i made this car, closed the game and opened it again, the car just breaks.

 

well, I do have a main.materials.json , but its empty. Is this what I'm doing wrong if so how do I fix this?

(I use the .cs file)

 

here's all the log I could find

 

wow, thank you so much for taking your time to help me!
I really appreciate it!