Error when running server.js on localhost:3000 "Cannot GET /"

[oakif]

When I try running node server.js from the Terminal in the folder the extension is unzipped to, I get the following error:

Transcribed messages:

Error. Make sure you're running the server by following the
instructions on https://github.com/gragland/chatgpt-chrome-
extension. Also make sure you don't have an adblocker preventing
requests to localhost:3000.

Cannot GET /