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Fix PowerShell 'Authentication Failed Permission Denied' Error - Troubleshoot Windows Activation Blank Screen-Fix Node Version Mismatch in npm install

2026-06-13 18:56:03cloud-software
Fix PowerShell 'Authentication Failed Permission Denied' Error - Troubleshoot Windows Activation Blank Screen-Fix Node Version Mismatch in npm install

Final checklist

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