I’m having a similar problem. It hasn’t happened before. I get this message on 2 new sites.
Your website needs to be publicly accessible to use Jetpack: site_inaccessible Error Details: The Jetpack server was unable to communicate with your site https://poundmusicempire.seeds2sow.org [IXR -32300: transport error: http_request_failed Couldn’t resolve host ‘poundmusicempire.seeds2sow.org’]
Could it have anything to do with Hostgator (my host) who have done major changes this past week – just moved to a new server? Or would it be something else?