Thanks for helping with my issues.
Unfortunately, I cannot uninstall plugins or change themes to test because the site is live and was built in the Avada theme. I will disable the pagination for now.
Regarding the thumbnails not displaying, I verified there was a preview image selected for both galleries and albums. The filepath to the thumbnails seems to be pointing to nonexistent directories. The complete filepath for the first gallery thumbnail is ./43/91x68/crop/ccdf13acc0239c583a48f28d485623f. Looking at the server’s file structure, I do not see anything like this. I found a subdirectory named “thumbs” inside the gallery directory uploads/site/1/nggallery/*GalleryName*/thumbs.
