Auth0 Quickstart - React


I just got started with the Auth0 Login in React with the quickstart kit. However, I was facing issues with the redirect Uri which was HTTP not HTTPS. Fixing it to HTTPS did the work, but the app shows error : " This site can’t be reached" when opening with https://localhost:3000/ but wth network URL it works.
Is it any issue or it is as expected?

On other hand, it was working fine for a day but next day when I try to run I get error : ** invalid_request : The specified redirect_uri ‘’ does not have a registered origin.**, when it worked previously. Kindly share some solution.