Walkability and Nearby Businesses not working

i have an issue with Walkability and Nearby Businesses and sometimes other tabs. When i refresh my website the tabs dont work and i get an AJAX error and the respose is 0. sometimes it works but most of the time it doesnt. is there a conflict or is it that my server is slow?

heres the link https://firsttimehomebuyers.me

https://www.ads-software.com/extend/plugins/simple-real-estate-pack-4/