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Knowledge Base

Unable to issue a Let’s Encrypt certificate for domain with forwarding hosting type when nginx is not installed and/or disabled on the Plesk server

 
2022applications extensionsdnsdomainsextensions

Symptoms

  • The Forwarding hosting type is set for the domain in Plesk > Domains > example.com > Hosting & DNS tab > Hosting Settings.

  • When trying to issue a Let's Encrypt certificate in Domains > example.com > SSL/TLS Certificates, an error that is similar to the following is shown:

    CONFIG_TEXT:Could not issue a Let's Encrypt SSL/TLS certificate for example.com.
    The authorization token is not available at http://example.com/.well-known/acme-challenge/vjcxCwV74PbWUvnMTT2o5MeWP8z0rg054SP_IfIYfXg.
    To resolve the issue, make sure that the token file can be downloaded via the above URL.
    Details
    Invalid response from https://acme-v02.api.letsencrypt.org/acme/authz-v3/76408809540.
    Details:
    Type: urn:ietf:params:acme:error:unauthorized
    Status: 403
    Detail: Invalid response from https://example.com/.well-known/acme-challenge/vjcxCwV74PbWUvnMTT2o5MeWP8z0rg054SP_IfIYfXg

Cause

This behavior is tied to the following known product issue:

  • #EXTSSLIT-1871 "If nginx is disabled, it is no longer possible to start securing a domain with the “Forwarding” hosting type (because this scenario is not supported and is bound to fail)."
    Fixed in:

    • SSL It! 1.9.10 10 February 2022

Resolution

Since the bug has been resolved permanently already, you should update the SSL It! extension to its latest version by using the steps in this article:

How to manage Plesk extensions (install, disable, remove, update)

If an update to the SSL It! extension is not possible for some reason, you may execute the following workaround:

Click on a section to expand

Workaround

  1. Log into Plesk
  2. Install and enable nginx on the server
  3. Issue the Let's Encrypt SSL certificate
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