GNOME Control Center can't add wallpapers when thumbnails can't be generated due to hardened kernels interfering with bwrap
Gnome Control Center won't add wallpaper. simplescreenrecorder-2020-08-09_10.29.33.mkv
How to recreate the problem:
- Open Gnome Settings
- Go to the wallpapers tab
- Click Add Image
- And observe the problem