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Fix ERR_CERT_AUTHORITY_INVALID on Localhost - How to Fix Nginx Upstream Connection Refused-Nginx Upstream Connection Refused: Quick Fix

Updated 2026-07-29 02:42:29browser-issues
Fix ERR_CERT_AUTHORITY_INVALID on Localhost - How to Fix Nginx Upstream Connection Refused-Nginx Upstream Connection Refused: Quick Fix
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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