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How to Fix a Detached HEAD in Git Using SourceTree - Fix pip Install Permission Error on macOS-Fix npm run build Failed with PostCSS Error

Updated 2026-07-28 11:07:00macos-help
How to Fix a Detached HEAD in Git Using SourceTree - Fix pip Install Permission Error on macOS-Fix npm run build Failed with PostCSS Error
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.