Thanks for reaching out @kjam. It sounds like Site Kit may have been connected on your staging site without having been reset when migrating to your live site. Is that correct? If so, considering you’re seeing a 404 on your live site, there are a few ways we can hopefully get you connected.
Rather than resetting, in the address bar of your site, do you see any references to your staging site URL in this callback URL when you land on the 404 page? If so you can manually change this and proceed with the new URL. Do let me know, and should you not see any references, please share your Site Health information and we can determine more, or perform a plugin reset.
Another option to ensure you can complete setup on the new site URL is to add a www prefix temporarily to your site URLs in your general settings. I’ll help you do so if the above fails. Do let me know if you have any questions with the above. Thank you.
