Sorry, I think that screenshot threw me off.
For some reason I didn’t realize you are trying to get this running locally. I never got the impression of having to install babel locally as part of the excercise. So unless it did install locally via the shown page in your screenshot, I didn’t install / run it locally. No, I never got a “script not found” error.
The excercise, however, I passed it with only a minor issue of having to wait a bit for the created folders/files to show up.
Not sure about this but the script “build” (“build”: “babel src -d lib”) is being looked for in the file package.json - which I can’t see in your screenshot. Also I believe a file called .babelrc might be required? Pretty sure the folder node_modules is required for babel to work properly, though.
Are you sure babel was set up properly?
This is what the folders looked like for me, it’s probably needed at minimum for babel to work: