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Nginx Upstream Connection Refused: Fixing localhost Errors - Fix Cloudflare DNS Propagation Taking Too Long-Windows Security App Not Opening After Update

Updated 2026-07-28 12:50:00windows-fixes
Nginx Upstream Connection Refused: Fixing localhost Errors - Fix Cloudflare DNS Propagation Taking Too Long-Windows Security App Not Opening After Update
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.