I am playing around with Intercepting/Parallel Routes and trying to follow the example given in the docs (https://nextjs.org/docs/app/building-your-application/routing/parallel-routes#modals) for a Login page that works both standalone from a "/signin" route and as a Modal from other pages. I've got it working when I am in "/car" but getting error when trying to open it from "/" route. Error is:

Uncaught TypeError: initialTree is not iterable

I am attaching my directory structure