As @kokolegorille suggests, this is an npm (/javascript) issue. These can be a bit of a trial-and-error pain to sort out. I would first check with the pragstudio course docs to be sure that you have the same node/npm versions that they use. Do the pragstudio courses offer somewhere you can ask questions? Npm issues are usually best dealt with by people who have experience with the exact packages involved. Lastly, from the trace you’ve given, it looks like the problem originates in this package: GitHub - paulmillr/chokidar: Minimal and efficient cross-platform file watching library · GitHub. You could try updating to the latest version of that (which may just cause further problems because of related dependencies), and/or look through the issues in that repo.
