Can not renew certificate [ERR] Exception not handled

Good day guys,
I am trying to renew my server certificate, using certify the web version on a windows 2012 r2 server. I have been using it for more that 2yrs without an issue.
The process start and runs through all the processes then stop with this error
Failed to begin certificate order. The CA ACME directory was not accessible: Exception not handled. Please report this to Certify the Web support

If I perform a test run all check OK.

The log files all show all in order except at the end give this error
2023-12-27 17:42:34.994 +02:00 [ERR] Exception not handled: System.Net.WebException: The remote name could not be resolved: ‘
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)

Any suggestions on what might be wrong ?


Your server is unable to resolve the Let’s Encrypt API domain name:

Something has changed on your server or your network DNS resolution and the app needs to be able to make outgoing https requests to your choice of Certificate Authority (the default being Let’s Encrypt).

Open a browser on your server and go to which should resolve OK, if that works then just click Request Certificate in the app to renew your certificate.

If that doesn’t work then review your server configuration so that it can resolve public DNS names. It could be something as simple as needing a reboot.