Issue with Let's Encrypt (suddenly no longer renewing).

This morning I have a message from Let's Encrypt that the renewal for one of my web sites failed. This web site has been successfully updating for the last year.

The interesting (or strange) part of this is that "Webmin" reported errors, but from one of my web sites that was NOT being updated, and still has a month to go before it should renew. I've stopped and started Apache (with no issue), checked DNS records in GoDaddy, but they have been unchanged for ages).

I'm really stumped on this and the cert runs out in a few days.

Here's are the two messages I received.

Error message from Let's Encrypt (Has successfully renewed 4 times in the past with no issues)

An error occurred requesting a new certificate for captnslounge.com, www.captnslounge.com, captnslounge.info, www.captnslounge.info from Let's Encrypt : Web-based validation failed : Failed to request certificate :

<

pre>www.captnslounge.info challenge did not pass: Invalid response from http://www.captnslounge.info/.well-known/acme-challenge/bdzdt48iruYpYiF8... "\n\n\n \n \n <meta htt"DNS-based validation failed : Failed to request certificate :

www.captnslounge.info challenge did not pass: DNS problem: NXDOMAIN looking up TXT for _acme-challenge.www.captnslounge.info

First part of mail from webmin - and the cert for this web site has 1 month to go and is not trying to renew. This was a new site (nigel-aves-photography.us) started one month ago. (My ip address is 8.44.146.52)

reason:         acme_tiny.py:198:get_crt:ValueError: nigel-aves-photography.us challenge did not pass: {u'status': u'invalid', u'validationRecord': [{u'url': u'http://nigel-aves-photography.us/.well-known/acme-challenge/1dvGU3n8rA5tLDL54wrZ8wJ7y4LVU96dNM4XBxYgpug', u'hostname': u'nigel-aves-photography.us', u'addressUsed': u'184.168.131.241', u'port': u'80', u'addressesResolved': [u'184.168.131.241']}, {u'url': u'http://nigel-aves-photography.us/OKaNZ/.well-known/acme-challenge

Any thoughts?

Nigel Aves.