Thanks so much. Your information helped me figure out the problem. Yes, you were correct, the domain name was not pointing to the main site folder. The issue is now resolved.
Thank you very much for this information. I’m not sure how to point the URL to open the primary Multisite website so that WordPress can “catch” it and serve the appropriate subsite. I’ve pointed the domain to the “public_html” but I still keep getting a folder view. Here are the URLs at this stage.