If the certificate has expired, browsers will show a “Not Secure” warning. In the Intellize panel, go to “SSL Renewal” or “Let’s Encrypt SSL” and re-issue or run AutoSSL again. If you installed certificates manually, order the renewal, download the new .crt and .key files, and reinstall them following the previous instructions. After installation, verify HTTPS is working: ```bash curl -I https://example.com ```