I am creating a fullstack application with a react front end (NOT FROM CREATE REACT APP), express, nodeJS and mySQL. I followed all the steps in setting up a simple login button for react using a .env file, const domain, const clientId and with @auth0/auth0-react but when I start my server on localhost, and then run my webpack to build the bundle, and then access the application on the localhost:port, I click login and it says: " This site can’t be reached
undefined ’s server IP address could not be found.
The URL shows https://undefined/authorize?redirect_uri=http....etc. etc. What could be the problem here?