Hi,
The issue is that on your related products listing module, each product was marked with schema.org/Product structured data. Google expects Product items to have an offers property (with a price). Products that have no price (like "Carpetas y cajas para cocas" and "Cajas microcanal para envios"), or at least none shown on the listing were flagged as having a critical error because they had no offers.
We have fixed this. The listing templates now use schema.org/ListItem instead of schema.org/Product for items within the category listing. The full Product structured data (with prices, availability, reviews, etc.) is only output via JSON-LD on individual product pages where all required fields are present.
The fix is available in the latest 6.4.0 package. You can download it from your member area and install it over your current version. After updating, you can re-run the Google Rich Results test and the errors should be gone. Note that it may take some time for Google to re-crawl your pages and clear the errors from Search Console.
HIKASHOP ESSENTIAL 60€The basic version. With the main features for a little shop.
HIKAMARKETAdd-on Create a multivendor platform. Enable many vendors on your website.
HIKASERIALAdd-on Sale e-tickets, vouchers, gift certificates, serial numbers and more!
MARKETPLACEPlugins, modules and other kinds of integrations for HikaShop
