Error occurs when trying to delete node_modules

node_modules folders are usually enormous (dependencies on dependencies on dependencies...), so they always take quite awhile to delete (I usually walk away from my computer while I'm waiting for it to finish deleting). It might just be that with the limitations Treehouse has to place on workspaces, it's too much for the workspace to handle all in one request, so it throws an error.

Do you strictly need to delete the folder, or are you just following along with an example where they show you how you can delete it, then reinstall everything with npm install? If it's the latter, I'd just move on. Later, when you're working locally with your own terminal and text editor, it probably won't be a problem.