Verify HTTPS certificate validity, expiry date, and issuer — and get fixes if it's expired or misconfigured.
| Expired cert | Auto-renew failed — renew manually and re-enable auto-renew |
| Wrong domain | Certificate issued for a different hostname (CN mismatch) |
| Missing chain | Intermediate CA certificate not installed alongside the leaf cert |
| CDN SSL mode | Flexible mode on Cloudflare can cause mixed-content or loop issues |
| Self-signed cert | Browsers reject self-signed certs unless explicitly trusted |
Yes. Modern browsers show a hard block. Search engines may de-rank or stop crawling. Fix immediately.
Let's Encrypt issues free, auto-renewing certificates. Most hosting control panels (cPanel, Plesk) have a one-click installer.
Renew at 30 days remaining. Let's Encrypt auto-renews at 30 days. Set a calendar reminder as a backup.