Sermon_Image Shortcode not working

The linked page is where the sermons will/would be. Right now they are in the standard list style format. But I am trying to get them into the grid format with [sermon_images] shortcode. But when I do it always says “No images found”. Am I missing something? I just want to get the Sermons to display in a grid/masonry style format.

The page I need help with: [log in to see the link]