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Fix Node Sass Build Failed: Sass Not Found - How to Fix Nginx 502 Bad Gateway in Docker-Fix Cloudflare 521 Error by Adjusting Firewall

Updated 2026-07-28 04:09:18office-tools
Fix Node Sass Build Failed: Sass Not Found - How to Fix Nginx 502 Bad Gateway in Docker-Fix Cloudflare 521 Error by Adjusting Firewall
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.