All Featured Images Showing As Logo – Can’t Clear Default Image

When I do a Google News search for “Science Trends” on mobile it shows every entry with the logo as the featured image. I believe this is due to the “default image” setting on the plugin but the “clear image” button doesn’t work and uninstalling and reinstalling the plugin doesn’t clear the settings. Please help or I’ll have to uninstall this plugin.

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