Windows Admin Center SDK - Public Preview Release

I am trying to use Windows Admin Center to create new tool extension. I was following the documentation (https://docs.microsoft.com/en-us/windows-server/manage/windows-admin-center/extend/develop-tool). After installing all prerequisites mentioned in "Prepare your Environment" section, I was trying to create new tool by using CLI command "wac create --company "Contoso Inc" --tool "Manage Foo Works"

But this gives error as

const { readdir, stat } = require('fs').promises;

TypeError: Cannot destructure property `readdir` of 'undefined' or 'null'. 

..........

Is there something I am missing?