filter search not working right

-- url of the page with the problem -- : dontknowpublishing.com
-- HikaShop version -- : 3.1.1
-- Joomla version -- : 3.7.4
-- PHP version -- : 7.1
-- Browser(s) name and version -- : firefox 54.0

I am at a loss. I have 2 sites set up one is the main site and the other is a sandbox to test features out. In the sandbox I have added a filter with search on author and title - also using the hikashop filter extension. It works just the way I want it to. I have what I think is exactly the same configuration on the main site and I keep giving no products found. I have gone through it line by line in the extension module for hikashop filter, the two plugins, display->filter, and the configuration files for hikashop. The two websites are dontknowpublishing.com and dontknowpublishing.com/sandbox. I know there must be some little item I did not do in the main site. Could you please direct me to what I have let out.