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Fix npm ERESOLVE Error in Monorepo Setup - Fix PowerShell Connection Refused on Localhost-How to Resolve Port Already in Use in Windows 10

2026-06-13 19:57:40developer-tools
Fix npm ERESOLVE Error in Monorepo Setup - Fix PowerShell Connection Refused on Localhost-How to Resolve Port Already in Use in Windows 10

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.