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How to Fix Cloudflare 522 Error: Origin Server Timeout - How to Solve Nginx Permission Denied on Upstream-Windows Defender Real-Time Protection Registry Fix Tutorial

Updated 2026-07-28 13:06:47developer-tools
How to Fix Cloudflare 522 Error: Origin Server Timeout - How to Solve Nginx Permission Denied on Upstream-Windows Defender Real-Time Protection Registry Fix Tutorial
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.