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Fix Nginx Upstream Connection Refused Timeout Error - Fix NET::ERR_CERT_AUTHORITY_INVALID by Clearing Chrome Certificate Cache-Python venv Troubleshooting Guide

Updated 2026-07-28 17:56:49browser-issues
Fix Nginx Upstream Connection Refused Timeout Error - Fix NET::ERR_CERT_AUTHORITY_INVALID by Clearing Chrome Certificate Cache-Python venv Troubleshooting Guide
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.