Plugin Search function not working

I really like the plugin, how you can transform posts into listings. I’m using the real estate theme you have also made, but am having trouble getting the search function to work.

The “area” or “property name” returns 0 results. Even if I leave it blank, and use other features like setting bath or bedrooms, it returns 0 results. Why is this? Am I doing something wrong or is it a known bug?

Thanks!

The page I need help with: [log in to see the link]