I just changed the port to 7778 and it shows this error: Uncaught ReferenceError: require is not defined at shopping-templates.js:1

Hi Lucia. Did you get any work around for this? Because I'm facing the similar issue with the tools. I had scem 2019.1. when I'm trying to run themes and extensions simultaneously in local. It's showing an error regarding same port issue. If I change the ports some issues are coming up.