yarn : File C:\Users\james\AppData\Roaming\npm\yarn.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at https:/go.microsoft.com/fwlink/?LinkID=135170. code example
Example: artillery annot be loaded because running scripts is disabled on this system
Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted