The temporary fix for Let’s Encrypt Certificate has expired Problem
A quick way of how I fixed Certificate has expired message on my website
Introduction
On 30th September 2021, the root certificate that Let’s Encrypt uses, the IdentTrust DST Root CA X3 certificate, expired
The fix
So basically, I was getting certificate has expired on Postman even after reinstalling the certificate with certbot. There are many options to fix this problem, including purchasing a new certificate from a different source, but this is a temporary quick fix that worked for me.
This issue was addressed on https://community.letsencrypt.org/t/problem-with-certificate-has-expired/161013 . I am using Ubuntu server 18.04.3 LTS for this but it should work on any Debian distro
Navigate to this location using the cd command /etc/letsencrypt/live/ . Find your domain and cd into it, edit the fullchain.pem file and remove the last certificate.
That’s it. Restart Apache and your error should be gone. Remember, this is a temporary fix and you should find a permanent solution to this problem.
