Just recently, our SSL certificate provider, Let's Encrypt, realized they've had enough sailing in smooth waters for the last 3 months and decided to find a bug in their code which eventually led them to a brilliant idea of revoking 3 million certificates they've issued earlier with less than 48 hours notice. 455 of those are of our clients.
This issue should self-resolve once certificates are revoked on their side and re-requested on ours. During the window between these events some sites might show a certificate invalid warning. For those users that wish to expedite the process, we suggest doing the following:
cPanel >> Security >> SSL/TLS -> Manage SSL Sites -> Delete the affected certificate
cPanel >> Security >> SSL/TLS Status -> Run AutoSSL
You can check if you're affected at https://checkhost.unboundtest.com/