Hi
I checked the site and I see you have set the same page as the WP Front page and as GD Home.
In GDV1, it is not possible to use a builder on the template pages. These include GD Home, Add Listing page, or Location page.
Instead, set a different blank page as GD Home. Then use your builder on the WP Front Page, adding GD shortcodes as you like.
To make the most of GD, then proceed to add widgets to the GD Home widget areas. These widget will then populate the GD Home and Location pages with your listings.
https://wpgeodirectory.com/docs/core-shortcodes/
https://wpgeodirectory.com/docs/widgets/
If you are really interested in using a builder on GD Pages, you can consider upgrading to GDV2, which allows the use of a builder on the Location and Detail and Listing/Archive pages.
https://wpgeodirectory.com/try-geodirectory-v2/