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Fixing Cloudflare 521 Error: Enable Origin Pull Setup - Nginx Permission Denied Error Log Location and Fix-Cloudflare 521: Server Not Responding Fix

Updated 2026-07-28 14:13:24cloud-software
Fixing Cloudflare 521 Error: Enable Origin Pull Setup - Nginx Permission Denied Error Log Location and Fix-Cloudflare 521: Server Not Responding Fix
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.

More repair notes

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