Hello,
I have installed Experience builder developer edition and installed the packages in both Client and Server side and I have started the builder.
I have tried to connect to my portal using https://localhost:3001/
And I have the client Id from OAuth 2.0
But I cannot access my portal using the localhost. I can open the portal in my browser normally and everything works fine.

Why I cannot access the portal using the local host, Anything will be very help. Thank you.