Suddenly local hosted Chromeduino Server stopped working

[GitNitneroc]

I don't know what caused this problem, but suddenly the Chromeduino Server I run on my Chromebook (localhost) stopped working.

The solution was to change app.js to specify 'localhost' in app.listen :
app.listen(port,'localhost', () => console.log(Example app listening on port ${port}!));

I don't know why this was suddenly required. It stopped working just after a Chromebook update, maybe node or express were updated ? Or maybe I updated it myself at some other point, but I can't recall that.