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Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Proxy Error - How to Run Command Prompt as Administrator When Access Denied-Windows Security Token Expired Error: Quick Fix Guide

Updated 2026-06-13 23:07:26cloud-software
Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Proxy Error - How to Run Command Prompt as Administrator When Access Denied-Windows Security Token Expired Error: Quick Fix 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.