Hello,
If you have correctly downloaded and installed the last Hikashop version but you're still having that issue, then it's probably coming from the fact that you have views overrides
You'll find more information about it through that thread :
www.hikashop.com/forum/install-update/89...-upgrade.html#294471
I followed the steps mentioned in the topic above, and while I couldn't replicate steps 3 and 4 (I have hikashop 3.2.1, and it seems that there are no such lines inside mentioned files), but after adding changes mentioned in steps 1 and 2, now all products are showing up again! Is it critical that I couldn't do the steps 3 and 4?
Yes as these modifications were based on last Hikashop versions, and the steps 3 & 4 are used to properly load products.
Best regards,
Mohamed Thelji.