Since I couldn't figure out the issue, I contacted my host who supplied this reason (and fixed it for me):
"It looks like the permissions on your /home/glorscom/public_html/gallery/albums/Performances folder, as well as some of the thumbnail images con...
"It looks like the permissions on your /home/glorscom/public_html/gallery/albums/Performances folder, as well as some of the thumbnail images con...