Error connecting Site Kit

Thanks for reaching out and sharing screenshots of your experience @stennu22. The “site not found” error you’re facing indicates that your site may have been previously connected at some stage, and when trying to communicate to set up the plugin once more, it’s no longer recognizing your credentials. So we can determine more on this, and ensure you can get the plugin successfully connected, please share the following:

1. Your Site Health information. You can use this form to share privately if preferred.  
2. Did you try to reset Site Kit at any stage (Tools > Available Tools > Reset Site Kit)? I’m aware you already tried other troubleshoot steps, however, if you didn’t already try this, please go ahead and do so, before attempting to set up the plugin once more.

Let me know if you have any questions with the above. Thank you!