Hi,
It seems that the problem comes from several things:
- you have the "force redirect" setting turned off in the settings of the HikaShop filter module in the Joomla modules manager. This means that when the module is displayed on a menu item of the type "HikaShop products / categories listing" it will stay on the current page and just refresh the main area where the listing of products is.
- your main menu item is apparently of the type HikaShop products / categories listing. Because of that the filter module tries to refresh the main area instead of switching to another page.
- your template doesn't display the main area of the page on the homepage which leads to the filter module not finding the area to refresh and failing.
So turn on the "force redirect" setting in your filter module and it should hopefully work. If not, make sure that in the "menu" setting of your module, you enter the id of a menu item of type "products listing" configured to display all the products and for which the template displays the main area of the page and it will work.