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Fix 'Connection Refused' Error When Command Prompt Not Working - Fixing Windows Defender Authentication Failed Permission Denied-How to Fix BitLocker 502 Gateway Error

Updated 2026-06-14 00:16:09browser-issues
Fix 'Connection Refused' Error When Command Prompt Not Working - Fixing Windows Defender Authentication Failed Permission Denied-How to Fix BitLocker 502 Gateway Error
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.