Hi, I have an unlisted Shopify app and I have setup App Proxy with prefix as "tools" and subpath as "manage-account". I have supplied the full URL of the php file under Proxy URL. When I click save, it says the proxy is ready for use. But when I try https:// .myshopify.com/tools/manage-account it gives takes me to the 404 not found page. Any help will be really appreciated. Thanks.