The developer also has been experimenting with the Big Map Rev01 and it does not work with the current version of WP . It was originally designed a couple of years ago and customized for customers who built their own theme using the SLP Big Map plugin style as a basis.
It is a template for styling that you would have to know and apply CSS to get it to work with WP 4.5 or higher and the theme you may be using.
The developer is looking to replace this plug in style with something that works similar to this but that is on the back burner. He left it as a plugin style choice because there are a few customers who have built their own site and customized theme and uses it.
You can try one of the other plugin styles and if you know CSS modify them with the Experience add-on. Sorry that this does not work the way it originally worked.
There are some You tube tutorials on the CSS process