The error occurs when I have a subdomain configured for my store. For example:
store.marketing.com.br
When adding products and going to the cart and checking out I am taken to "/onepagecheckout#opc-billing". The moment I click "Continue" in "Billing address" I am taken to "cart/" and then it stays in the loop.
*I can see when inspecting the console, in Chrome, an error appears very quickly and I had to be a ninja to take a screenshot that says the following: "The page was loaded over HTTPS, but the request was insecure XMLHttpRequest"
* This is only happening when I have a subdomain configured store.marketing.com.br
* I configured the store URL correctly in "Admin/Store/Edit/1", that is, "https://store.marketing.com.br" and also checked Enable SSL.
* nopCommerce version 4.60.6