Issue with community.elgg.org certificate?

In Firefox, I cannot connect to community.elgg.org. Below is a copy of the text in the box


This Connection is Untrusted

You have asked Firefox to connect securely to community.elgg.org, but we can't confirm that your connection is secure.

Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified.
What Should I Do?

If you usually connect to this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox only connect to it securely. As a result, it is not possible to add an exception for this certificate.

community.elgg.org uses an invalid security certificate.

The certificate is only valid for the following names:
  elgg.org, reference.elgg.org  

(Error code: ssl_error_bad_cert_domain)

 

  • The certificate was renewed recently, and community.elgg.org was not included in the new certificate (only elgg.org). There are however so many links still pointing to it, that we most likely need to add it back.

  • Due to the beta-test phase of the used Let's Encrypt ca the lifetime of certificate is limit to 3 months. The actual certificate will expire on 7.6.

    As far as I see in the certificate it already covers  two domain names:
    DNS Name: elgg.org
    DNS Name: reference.elgg.org

    Adding the missing DNS-names should be easy.