Refreshing with angular-oauth2-oidc

Hi. I am using angular-oauth2-oidc for a small demo on OAuth2 in Angular and the refresh function doesn’t work. Upon a request like:

https://philly-vanilly.auth0.com/authorize?response_type=id_token%20token&client_id=XXXXX&state=YYYYY&redirect_uri=https%3A%2F%2Fphilly-vanilly.github.io%2Finit-auth%2Fsilent-refresh.html&scope=openid%20profile%20email&nonce=ZZZZZZ&prompt=none&audience=https%3A%2F%2Fphilly-vanilly.auth0.com%2Fapi%2Fv2%2F

I get a response like:

https://philly-vanilly.github.io/init-auth/silent-refresh.html#error=login_required&error_description=Login%20required&state=YYYYY

Can you please give a hint what I am doing wrong?

Here is my app:
https://philly-vanilly.github.io/init-auth
And here is my code:

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