Unable to generate lets encrypt ssl certificate for virtualmin virtual server

Hi All, I have tried, but cannot figure out what I have done wrong. I have a new Virtualmin install, with external DNS provider and have disabled BIND. Everything seems to work fine without any DNS issues. I can browse to www.anewwebsite.com.au without problems, and some checks via mxtoolbox seems to indicate that everything is OK.

However.. I cannot get Lets Encrypt to create a certificate for a virtual server. I get the following error, and was hoping someone might have a clue ?

Requesting a certificate for anewwebsite.com.au from Let's Encrypt .. .. request failed : Failed to request certificate :

Parsing account key... Parsing CSR... Registering account... Traceback (most recent call last): File "/usr/share/webmin/webmin/acme_tiny.py", line 203, in main(sys.argv[1:]) File "/usr/share/webmin/webmin/acme_tiny.py", line 199, in main signed_crt = get_crt(args.account_key, args.csr, args.acme_dir, log=LOGGER, CA=args.ca) File "/usr/share/webmin/webmin/acme_tiny.py", line 90, in get_crt "agreement": "https://letsencrypt.org/documents/LE-SA-v1.1.1-August-1-2016.pdf", File "/usr/share/webmin/webmin/acme_tiny.py", line 47, in _send_signed_request protected["nonce"] = urlopen(CA + "/directory").headers['Replay-Nonce'] File "/usr/lib/python2.7/urllib2.py", line 154, in urlopen return opener.open(url, data, timeout) File "/usr/lib/python2.7/urllib2.py", line 431, in open response = self._open(req, data) File "/usr/lib/python2.7/urllib2.py", line 449, in _open '_open', req) File "/usr/lib/python2.7/urllib2.py", line 409, in _call_chain result = func(*args) File "/usr/lib/python2.7/urllib2.py", line 1240, in https_open context=self._context) File "/usr/lib/python2.7/urllib2.py", line 1197, in do_open raise URLError(err) urllib2.URLError: