Pictures Not Showing

My product page galleries have stopped showing any pictures when this plugin is enabled. I am running a minimally customized Storefront theme on the latest version of WordPress. All of my plugins/themes are up to date. I don’t remember updating anything else without checking if product pictures were working although I could be mistaken as I’ve been doing lots of web work lately. When the plugin is disabled, my pictures show as normal; however nothing shows when the plugin is enabled:

Plugin disabled: https://www.dropbox.com/s/gjvsuj9dud0q6q7/teacups_disabledPlugin.png?dl=0
Plugin enabled: https://www.dropbox.com/s/p0czuxet5zj8h6s/teacups_enabledPlugin.png?dl=0