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Fix Cloudflare 521 Error: DNS Configuration Problem - Stop Nginx Infinite Redirect Loop-Fix 'Permission Denied' Error When Saving VS Code settings.json

Updated 2026-07-28 16:29:51browser-issues
Fix Cloudflare 521 Error: DNS Configuration Problem - Stop Nginx Infinite Redirect Loop-Fix 'Permission Denied' Error When Saving VS Code settings.json
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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