Could not issue a Let's Encrypt SSL/TLS certificate via Plesk

Linode Staff

I'm unable to get an SSL certificate via Plesk with the following error:

Could not issue an SSL/TLS certificate for
Could not issue a Let's Encrypt SSL/TLS certificate for Authorization for the domain failed.
Invalid response from


Type: urn:ietf:params:acme:error:connection

Status: 400

Detail: Fetching Connection refused

1 Reply

It appears that some other Plesk users have run into similar problems installing SSL certificates. It looks like this user was able to bypass the error by removing a JSON file in their /usr/local/psa/var/modules/letsencrypt/orders directory that contained a ‘pending’ status. Based on this thread, it also appears that this could be a potential bug in Plesk:

Could not issue a Let’s Encrypt SSL/TLS certificate

And this user was able to solve the problem by adding an alias to the nginx directives of their domain:

[Resolved] Could not issue a Let's Encrypt SSL/TLS certificate

This user was running into issues caused by a firewall blocking connections during the SSL request:

Unable to issue Let's Encrypt certificate in Plesk: "Timeout during connect (likely firewall problem)" OR "Error getting validation data"

It also looks like Plesk has a troubleshooting guide for SSL certificates that may be of some help:

Troubleshooting failed Let's Encrypt certificate installations for a domain in Plesk

And in case you haven't seen it yet, we have an Nginx guide that discusses how to configure SSL certificates with Nginx:

Getting Started with NGINX - Part 3: Enable TLS for HTTPS Connections

If you fix the issue, please reply here with the steps taken so that anyone else running into similar problems can try out your solution!


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