Doesn't work "Login by Auth0 WordPress Plugin" as expected/ documented for existing users

I have a wordpress site installed in AWS EC2 (bitnami) with some existing users. I have installed “Login by Auth0” plugin as documented here: Login by Auth0 WordPress Plugin

I have tried both Standard and User migration (login and get scripts works properly by fetching my wordpress site users but after saving/publishing, in both the approaches, I can’t use my existing wordpress credentials to login to Auth0. It works only after signing up in Auth0 universal form.

Is this a bug ? Does the endpoints are not reachable from my VM? Any pointers please let me know.

Thank you