Map not loading in a tab

Thanks for what seems like a great plug-in. Just testing it before going Pro. The map will appear within a tabbed section on our website, but it doesn’t seem to want to load.
https://www.secret-south-france.com/template/ go to Location & Area details tab to view. Any help would be much appreciated as this would be the perfect plugin for our site.

https://www.ads-software.com/plugins/leaflet-maps-marker/