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Fixing Cloudflare 521 Error with Nginx Configuration - Fix pip SSL Certificate Verify Failed Behind Proxy-Fix 'nvm command not found' After Restarting Windows

2026-06-13 12:20:08
Fixing Cloudflare 521 Error with Nginx Configuration - Fix pip SSL Certificate Verify Failed Behind Proxy-Fix 'nvm command not found' After Restarting Windows

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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