Error: Let's Encrypt SSL certificate installation failed:

Server
4

I’m getting exactly the same via Plesk -

Error: Let’s Encrypt SSL certificate installation failed: Could not obtain directory: Invalid response: <HTML><HEAD><TITLE>Error</TITLE></HEAD><BODY>
An error occurred while processing your request.<p>
Reference&#32;&#35;97&#46;57f01202&#46;1495187782&#46;22ec9ac4
</BODY></HTML>
.
Status: 504.

Using Plesk 12.5.30 Update #66
Let’s Encrypt plug in version: 2.1.0 Release: 48

Hope that helps get a resolution…

Thanks,

Peter