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Troubleshoot Python Virtual Environment Not Working: Practical Fixes - Fix npm run build Failed with PostCSS Error-How to Fix 'Port Already Allocated' in Docker Compose

Updated 2026-07-28 04:08:37office-tools
Troubleshoot Python Virtual Environment Not Working: Practical Fixes - Fix npm run build Failed with PostCSS Error-How to Fix 'Port Already Allocated' in Docker Compose
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.

More repair notes

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