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Cloudflare 521 Error: Fixing WordPress Connection Issues - Fixing Nginx Connection Refused to Upstream-Python Requests Timeout: How to Set and Handle It

Updated 2026-07-28 09:40:29browser-issues
Cloudflare 521 Error: Fixing WordPress Connection Issues - Fixing Nginx Connection Refused to Upstream-Python Requests Timeout: How to Set and Handle It
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.

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