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Fixing node-sass Build Failures on macOS - How to Fix Cloudflare Error 521: Server Not Responding-Resolve NET::ERR_CERT_AUTHORITY_INVALID in Chrome

Updated 2026-07-28 22:10:28windows-fixes
Fixing node-sass Build Failures on macOS - How to Fix Cloudflare Error 521: Server Not Responding-Resolve NET::ERR_CERT_AUTHORITY_INVALID in Chrome
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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