Image Map in post isn’t working

There is very little on the web and forums about using an image map in a post. I did find this link: https://www.mukaumedia.co.uk/using-an-image-map-in-a-wordpress-page-or-post/

and followed these instructions but something isn’t working. Here is the link to the test page with the image map. Any suggestions or thoughts? Is this just something that WordPress can’t support?

https://nicholsondrilling.com/wordpress/?page_id=5

Thanks!