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Fix Nginx Upstream Connection Refused Behind Cloudflare - PowerShell Permission Denied in VS Code: How to Fix-How to Fix Cloudflare 521 Error Due to Proxy Issues

2026-07-28 12:43:28
Fix Nginx Upstream Connection Refused Behind Cloudflare - PowerShell Permission Denied in VS Code: How to Fix-How to Fix Cloudflare 521 Error Due to Proxy Issues

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

Next references

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