sry if i repost i need help please help me guys

hey i am pretty new to unity well not bad i got it for RUST SDK aaaaand ye i wokr with it while ago and in rust sdk there is preview file wich will show the item with colors and textures and a flat green cylinder under it well now i am back to unity and i open the preview it obly show lines :/ like just lines no color light gray any help plz? :///
sry for reposting and my bad english the
summary: the texture or colors arent showing for the model

 

There are a few reasons this could be happening, all of which are pretty easily discover-able if you go through all the components of the object. If a texture is missing, then there will be a texture missing in the inspector as well.