title: When I open the terminal shows "The specified command("completion") is invalid. For a list of available options, run "ng help"
body: <p>When I open the terminal did't do anything. It will shows errors as below.</p>
  <p><a href="https://i.stack.imgur.com/lx1jC.png" rel="noreferrer"><img src="https://i.stack.imgur.com/lx1jC.png" alt="enter image description here" /></a></p>