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Checklist for Nginx Configuration Test Failure - How to Solve NET::ERR_CERT_AUTHORITY_INVALID in Chrome at Work-How to Fix Nginx Backend Connection Refused Behind Cloudflare

Updated 2026-07-28 17:52:28cloud-software
Checklist for Nginx Configuration Test Failure - How to Solve NET::ERR_CERT_AUTHORITY_INVALID in Chrome at Work-How to Fix Nginx Backend Connection Refused Behind Cloudflare
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.

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