Untitled

Processing candy.hoyle.me.uk with alternative names: www.hoyle.me.uk
 + Checking domain name(s) of existing cert... unchanged.
 + Checking expire date of existing cert...
 + Valid till Apr 30 05:26:00 2017 GMT Certificate will expire
(Less than 30 days). Renewing!
 + Signing domains...
 + Generating private key...
 + Generating signing request...
 + Requesting challenge for candy.hoyle.me.uk...
 + Requesting challenge for www.hoyle.me.uk...
  + ERROR: An error occurred while sending post-request to https://acme-v01.api.letsencrypt.org/acme/new-authz (Status 500)

Details:
<HTML><HEAD><TITLE>Error</TITLE></HEAD><BODY>
An error occurred while processing your request.<p>
Reference&#32;&#35;179&#46;ae921602&#46;1493577486&#46;27917705
</BODY></HTML>