Try to use Auth0 with my backend server. But I didn't working

First, I have a test project that I try to create a backend server to implement with my game project in the future. I make my server with Express and try to use auth0 with my server.
I have to create an application in dashboard and select Regular Web Application when created. I follow a quickstart but when I try to go to localhost:2999/login , It doesn’t show anything and just load a web page.