ImacPrestashop not showing products

Hi, suddenly the plug-in stopped to show the products.

Here a link where products were displayed

https://www.velodrome-cycling.com/blog/il-casco-comfort-e-sicurezza-guida-allacquisto/

I notice that
Test the Connection (If you make changes save first) doesn’t works.
Regards
Klaus

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