From what I can see, any call to https://ai2.metricrat.co.uk will get a response from the google site, and not the server. From what you say, we need to be able to get a call from http://ai2.metricrat.co.uk in order to help certbot validate the site? This http address is not setup on the server or on the virtual host. Is there anything I can add or change to make this so, or have I got this wrong ?
I was able to set up the https certificate in the first place, and it is clearly working now; my site ai2.metricrat.co.uk is using an https secure address. I do not understand why certbot cannot validate when everything appears to already be in place?
If we cannot solve it on the community, what recourse do I have to “letsencrypt” to get this resolved ?