title: ng update: Unexpected token T in JSON at position 0: TF400813: Resource not available for anonymous access. Client authentication required
body: <p>I'm using angular 5 and I'm trying to migrate to angular 6. If I run `ng update, I get the following error:</p>
  
  <blockquote>
    <p>Unexpected token T in JSON at position 0 TF400813: Resource not
    available for anonymous access. Client authentication required.</p>
  </blockquote>
  
  <p>How can I solve this?</p>