Slider enabled but images not showing

I’ve downloaded the plugin to replace the featured image on my theme (Showthemes – Januas) with a slider. The plugin is enabled, slider attached to slide and it appears in the page options to show but the slides just do not show. Page is https://techugtest.com/events/techug-glasgow-30th-august-2018/

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