React app stuck on "starting development server"

Imported a react project from github but it doesn’t start. The logs show this over and over
:information_source: 「wds」: Project is running at

ℹ 「wds」: webpack output is served from 

ℹ 「wds」: Content not from webpack is served from /app/public

ℹ 「wds」: 404s will fallback to /

Starting the development server...`

And opening it in the browser shows ‘Starting…’

This is my app.

I found this online:

Make sure you run your app on port 3000.

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