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Home / windows-fixes / Fix npm run build Failed with PostCSS Error - Fix VS Code Permission Denied When Saving Workspace-Fix Windows 11 Assistant Stuck at 99% Antivirus Issue

Fix npm run build Failed with PostCSS Error - Fix VS Code Permission Denied When Saving Workspace-Fix Windows 11 Assistant Stuck at 99% Antivirus Issue

2026-07-28 14:31:46
Fix npm run build Failed with PostCSS Error - Fix VS Code Permission Denied When Saving Workspace-Fix Windows 11 Assistant Stuck at 99% Antivirus Issue

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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