Cannot see credentials input after installation

Hello everybody!
I was just curious about Entando and tried to install it on Windows following the getting started section of the website.
I’ve reached the final stage where Entando is up and running on K8s, but when I open quickstart.mshome.net/app-builder i cannot see the login/pwd text boxes in the central frame. I can only see an error “Invalid parameter: redirect_uri”

any suggestion please?

Thanks