Where should add the CDN script?

Hi Kim. I installed auth0.js with npm, and I am importing auth0 successfully on my Angular service (import * as auth0 from ‘auth0-js’;).

But are you sure I can skip the “add script” step recommended by the guide? Auth0 Angular SDK Quickstarts: Login
See attached image.

I am asking this because I am still getting errors with authentications (see attached image), and when I add the recommended script tag to my index head or body, I get a new error.