Does not load products

Hello. Since yesterday, i am facing an issue with the functionality of WooCommerce. All the products are loading only when I am connected as a user (admin). For anybody is trying to open any product using the product is not loading. You can seen an example at: https://www.atiner.gr/product/membership. I disabled all the other plugins to see if there is any conflict, but the problems insists.

The page I need help with: [log in to see the link]