Hi @tthomas we have already chatted via the Certify The Web support helpdesk and your servers are running Certify Certificate Manager, you need to remote onto the servers and look at what the app says, but the problem you reported to me is probably a firewall blocking port 80 or cloudflare etc is not allow http port 80 traffic through to your servers.
I'd advise you to engage a technician to investigate this on your behalf as I get the feeling you don't have time to look at this in the required detail yourself. It's fairly straightforward if you have already gotten a certificate before.
If you are using cloudflare for domains note that you also have the option of using DNS validation instead of http validation: