File C:\Users\xxx\AppData\Roaming\npm\tsc.ps1 cannot be loaded. The file
C:\Users\xxx\AppData\Roaming\npm\tsc.ps1 is not digitally signed. You cannot run this script on the current system.
For more information about running scripts and setting execution policy, see about_Execution_Policies at
https:/go.microsoft.com/fwlink/?LinkID=135170.
Run PowerShell (Admin)
> C:\WINDOWS\system32> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope LocalMachine