Thumbnail not loading

I put the plugin in our widget area #2 in the footer but the thumbnail does not load. Here is what is looks like (https://cl.ly/c2612302b6bd)

It says “This site can’t load Google Maps correctly. Do you own this website?”

The error in the INSPECT Console says — Failed to load resource: the server responded with a status of 403 ()

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