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Fix npm run build Failed with PostCSS Error - Windows Can't Access Shared Folder? Firewall Fix-How to Fix Cloudflare 526 and 525 Errors on Origin

2026-07-28 16:38:54
Fix npm run build Failed with PostCSS Error - Windows Can't Access Shared Folder? Firewall Fix-How to Fix Cloudflare 526 and 525 Errors on Origin

Result check

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

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