yarn : File C:\Users\jeff.han\AppData\Roaming\npm\yarn.ps1 cannot be loaded. The file
C:\Users\jeff.han\AppData\Roaming\npm\yarn.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.
At line:1 char:1
+ yarn add @craco/craco
+ ~~~~
+ CategoryInfo : SecurityError: (:) [], PSSecurityException
+ FullyQualifiedErrorId : UnauthorizedAccess
标签：AppData,jeff,yarn,cannot,error,loaded,ps1 From： https://www.cnblogs.com/janmson/p/17023125.html