Help! gd_listing_map and gd_homepage_map not showing anything

Link to test page: http://pelvicguru.charmfernandez.com/test/
Link to Directory page: http://pelvicguru.charmfernandez.com/directory

Hello! I would like to use the gd_listing_map and gd_homepage_map shortcodes.

In our test page here’s the shortcode and properties I used.
[gd_listing_map width=100% height=500 scrollwheel=false post_type=”gd_professional” category_id=”81″]
[gd_homepage_map width=100% height=500 scrollwheel=false]

But for some reason nothing is showing on the map when the page loads.
Just a blue color with nothing on it. And in gd_homepage_map’s case, nothing shows up until I search a name. Please see attached.

I would like to show the listings of gd_professional post type. I think I’m missing a configuration here that’s why nothing is showing up. If you may, please direct me to where I should configure this. Thank you!