Hi,
This error comes from the Joomla SEF, not HikaShop. So the HikaShop options of the menu are not related. The issue means that joomla SEF system thinks that the menu is a joomla category listing and not a HikaShop category listing because there is apparently a menu item of Joomla with the same alias as your hikashop menu item or something like that and then it tries to load the category of the id given in the URL but the id doesn't exist as a joomla category as it is the id of a hikashop category.