Having issues with Icons

inspired_art_86a3f09735

4.15 
What's going on with the icons in the library? I lost the pictures of the icons across the entire install..
Went back and reformatted, installed, and now the icon pictures in categories are still missing, or appear like this...
 

PerttiA

https://www.daz3d.com/forums/discussion/393566/how-can-i-fix-missing-thumbnail-images-in-smart-content/p1