Fix Nginx Redirect Loop: Permanent Solutions - DNS_PROBE_FINISHED_NXDOMAIN: ipconfig flushdns Not Working-Troubleshooting Cloudflare SSL Modes: Full, Strict, and Flexible

Likely symptom
Likely cause
Safe rollback
Verification route
- Repeat the original action, not only a simplified test case.
- Restart the app or reload the service after configuration changes.