loading the page “https://domaine.com/buy/productpage

Hello,
I’m using Surecart on a new site and I’m very happy with it. THANKS !
If I create a “Shop” page, customers can see the products and make their purchases.
I have a site in the field of energy healing, I sell ebooks and healing services.
I didn’t want to put a “Shop” page, but rather links to direct pages like this:
https://mickaeltessier.com/buy/ebook-eveillez-votre-potentiel-interieur

The only thing is, the page loads, I have my logo, but no content is displayed.
In test mode, everything worked.
I haven’t used the site for a few days and I noticed this problem.
For cache, I use LiteSpeed, I disabled it, but that doesn’t solve the problem.
Everything works except this page. Even going through the product sheets, with the “View” link gives me the same result.

While waiting to resolve the problem, I put a link in my pages going to “Shop”, but hey….

Thank you for your help !

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