Home / Notes / ssl-certificate-expired
ssl certificate expired fix today
NET::ERR_CERT_DATE_INVALID is a revenue event. We renew, fix mixed content, and put HTTPS back on the apex the same day.
Visitors bounce. Forms fail. Google Search Console starts reporting coverage errors. An expired cert is not a branding issue.
Let’s Encrypt auto-renew that died on a crontab. Cloudflare proxy with origin cert mismatch. A leftover www SAN. We fix the chain the browser actually sees, not the one in a screenshot from last year.
HTTPS on the document with http:// images and scripts still fails the padlock. We grep the built HTML and CMS and close it.
Send the domain and who owns DNS. We put a valid cert on apex + www, prove the lock, and leave HSTS only when the chain is stable.