Ensure Molin is not blocked by your security solution.
If you are using a security solution for your shop, it can block Molin from downloading your feed.
Make sure that your feed is accessible from our static IPs.
Configuration can vary depending on your security solution, but generally, you can allowlist the IPs in your firewall or security settings.
Only the feed URLs need to be allowlisted, not your entire domain.
You can use a custom security rule to allowlist our IPs.
https://www.shop.com/google-products.xml
(http.request.full_uri eq "https://www.shop.com/google-products.xml" and ip.src in {35.207.69.21 209.38.162.12})
Example: