Facetwp bookings availability search

I tried to implement the add-on Bookings by Facetwp (click here to view add on with the Facetwp plugin. The search field is shown, though it doesn’t work. See example page here

What am I doing wrong here?

The purpose is to have people fill in a start and end date which will show available trips.

Or if someone has a better solution to search through WooCommerce products via a date range, that would be great.