Issue Porting to Dev Rig

I have an application built using React, Node.js, HTML, JS and CSS. It runs perfectly fine within a browser but when I try to get it to run as an extension in the dev rig nothing happens. No errors or anything of the sort in the developer console either. So not sure what is happening here. Any help?

(Even when throwing just some plain text into my panel.html, it still doesn’t load the text)

Solved. Issue was with the commands I was giving to start the front end.

How did you solve it?

Rather than flagging your own post as spam, can you describe your solution for others?