Hi, this error message was recently added, which is interesting. This should only occur if the app is failing to speak to the ACME API service (e.g. the Let’s Encrypt API). Which would usually be because the machine firewall prevents outgoing https. Is the same machine able to directly browse to https://acme-v02.api.letsencrypt.org/ ?
Let’s Encrypt do have some maintenance downtime scheduled for their service tomorrow but there shouldn’t be any issues just now and it’s currently working for me.
If the problem persist feel free to send your log file through to support {at} certifytheweb.com
Thanks for clarifiying the error, and pointing me in the right direction.
Everything needed appears to work outbound, but when I run a manual certbot challenge I get a “Connection reset by peer” error.
I now believe that this is likely caused by recently implimented DDoS mitgations on our managed firewall, eg. geo-blocking on our domain is preventing lets encrypt from accessing the acme-challenge address.