For my ZNC server I use a SSL cert from Lets Encrypt. Recently, one of the certificates in the root chain expired, so I was able to run a command on my server to update the root chain to a trusted certificate which now shows as not expired (Source: https://blog.devgenius.io/lets-encrypt-change-affects-openssl-1-0-x-and-centos-7-49bd66016af3).

However, I'm still getting the error about the certificate has expired. Here's screenshots of the certifcate path and error message. https://imgur.com/a/s72BDlC