I pulled a minor upgrade to an Electron app and now npm start, which is simply an alias to electron app/, throws an Unknown argument: app/ error. The version of Electron bundled in the app is no longer officially supported (15.1.0) but this happens with a globally installed current version as well. I feel like the problem is at the shell (zsh) or OS level (macOS Monterey 12.5.1) but don't know where to begin chasing down such a fundamental problem. This was working last night and has been working for years, literally.
Thanks for any insights/suggestions.