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Firefox Secure Connection Failed: How to Fix - Nginx Configuration Test Failed: Duplicate Listen Fix-Troubleshooting Cannot Find Module in npm Build

Updated 2026-07-28 10:18:34developer-tools
Firefox Secure Connection Failed: How to Fix - Nginx Configuration Test Failed: Duplicate Listen Fix-Troubleshooting Cannot Find Module in npm Build
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.