The customer is having issues with redirect URL when hosting Enrollsy in a frame on their Shopify site:

Can I change the target of the Redirect URL to the parent window (or top window)? We're hosting enrollsy in a frame in our site and getting an error on the URL redirect because the domain of the frame becomes the same domain as the parent and Shopify prevents that

The customer contacted us to inquire about the target for the redirect URL in Enrollsy and to report an issue with the redirect URL not loading in the parent window when hosted in an iframe:

We load our enrollment form in an iFrame on our site. We want to use the URL redirect to direct enrollees to a completion page on our site that hosts a tracking pixel and information for the enrollees. Unfortunately, the redirect tries to load in the iFrame and our server is refusing to load it.