Beginner Vue.js Tutorial with User Login

Hello,

After adding the Auth0Plugin references to main.js, I am greeted with a blank page and this error in the console:

Uncaught TypeError: Cannot read property ‘install’ of undefined

referring to this section of code:

Vue.use(Auth0Plugin, {
domain,
clientId,
onRedirectCallback: appState => {
router.push(
appState && appState.targetUrl
? appState.targetUrl
: window.location.pathname
);
}
});

I have triple checked the reading and values of the auth_config.json file. Running on ubuntu.

Thoughts?