Have you tried another re-install of the newer code? Perhaps something went wrong in your upload/install? Or maybe you've used a faulty one-click install offered by the hosting company?
Or there's the related FAQs on the topic:
- https://www.zen-cart.com/tutorials/i...hp?article=281
- https://www.zen-cart.com/tutorials/index.php?article=84
Bookmarks