@flexfanatic You’ve not provided enough detail to be able to provide any direct instructions.
To try and debug yourself, you can use the ‘Deploy File Browser’ to see what files you’ve deployed:
https://answers.netlify.com/t/new-feature-browse-files-in-your-deploy-with-the-deploy-file-browser/105196
If there is no index.html in the root, (and you have no other serverless functions that would handle that route), then you’re going to see the Page Not Found (404) error when accessing your site.
If you want someone else to check what you have, you’ll need to actually show what you have.
Preferably with a link to a public repository.