Errors with the StackBlizt Custom UI version

Hi there. I downloaded the customized UI project from stackblitz (https://stackblitz.com/edit/grapesjs-react-custom-ui?file=src%2FApp.tsx ) and try to run it; but I get some errors.

First, there seems to be a routing error with App.jsx but that was easily solved by changing the extension to .js

But then I keep getting some error with babel, and a very discouraging message about how it's not being maintained anymore.

Honestly, I wouldn't wanna work with unmaintained dependencies since I figure it would be a headache down the road.

Any suggestions?