SOLVED: Blank images on library folders

[cantcurecancer]

• Tried a different theme
  

Try running Jellyfin without a theme. Those icons on your library are not blank. They look like custom made images that someone made for their theme.
Go into [dashboard --> general --> custom css code] and see if you are importing any custom theme. If so, delete the lines that do so and save the changes. Then reload the browser (and maybe rescan your libraries again) to see the changes.
Just remember to copy and paste the deleted code onto a separate document if you want to remember how to get back the current theme.

Also, I'm not sure if the custom theme you have running will allow this, but you should still be able to upload a custom image to your library folders in [dashboard --> libraries --> (3-dot menu on libraries "edit images")]

Thanks for your response, but after following your steps and removing the custom CSS code for the theme, the libraries still have blank images. I cleared browser data and restarted the server after removing the theme to verify. I guess I could place my own images on the libraries, but I liked the auto-generated Jellyfin images for my libraries so I'm trying to make that work.