Thumbnails not generating in Nautilus

I installed and fully updated Tumbleweed with Gnome and am having an issue with thumbnails not showing up for picture files of any kind. When I open pictures with gThumb, the thumbnails are generated but not until I open the pictures with gThumb.
I have tried deleting the thumbnail cache and ensured Nautilus was set up to show previews.
Any ideas?

Since it was so early in the installation, I just reinstalled Tumbleweed and it is working fine now. I’m not sure what was causing the problem.