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Fix Nginx HTTP to HTTPS Redirect Loop Error - How to Fix Cloudflare 521 Error (Port 443 Blocked)-VS Code Terminal Permission Error Guide

Updated 2026-07-28 13:08:58macos-help
Fix Nginx HTTP to HTTPS Redirect Loop Error - How to Fix Cloudflare 521 Error (Port 443 Blocked)-VS Code Terminal Permission Error Guide
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.