Getting Started with React - failed to compile error

I’m working through the Getting Started With Reach tutorial and have hit a snag at the point under the “Component props” heading where the instructions say: " Add a prop of subject to the <App/> component call, with a value of Clarice ." My dev environment browser, at localhost:3000 displays a “Failed to compile” error page. Initial setup worked fine using Ubuntu 20.04 LTS terminal in Windows 10 with Visual Studio Code editor.

Any advice much appreciated.

Not to worry, I appear to have fixed this!