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Fixing NGINX 502 Bad Gateway in Docker Containers - Troubleshooting DNS Probe NXDOMAIN VPN Issue-How to Fix NET::ERR_CERT_AUTHORITY_INVALID from Chrome Policy

2026-07-28 13:43:59office-tools
Fixing NGINX 502 Bad Gateway in Docker Containers - Troubleshooting DNS Probe NXDOMAIN VPN Issue-How to Fix NET::ERR_CERT_AUTHORITY_INVALID from Chrome Policy

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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