certificate-expired
ssl
SSL Certificate Expired / Not Secure Warning
Browser shows a certificate expired/invalid warning when visiting the site.
Read the fix dns domainDNS Propagation Delay After Domain/Host Change
Site works for some visitors/locations but not others shortly after an A-record or nameserver change.
Read the fix certificate-expired cron sslSSL Certificate Not Auto-Renewing (Let’s Encrypt Renewal Failing)
The certificate expires on schedule instead of renewing, so browsers show a security warning roughly every 90 days.
Read the fix