yarn : File C:\Users\ivamp\AppData\Roaming\npm\yarn.ps1 cannot be loaded because running scripts is disabled on this sy
stem. For more information, see about_Execution_Policies at https:/go.microsoft.com/fwlink/?LinkID=135170.
At line:1 char:1
+ yarn config set registry https://registry.npm.taobao.org/
+ ~~~~
+ CategoryInfo : SecurityError: (:) [], PSSecurityException
+ FullyQualifiedErrorId : UnauthorizedAccess
问题解决。