Vercel deployment issue

[mahettom]

First logs on Vercel was

Error: page.tsx doesn't have a root layout.
Error: Command "npm run build" exited with 1

After searching a solution without success
I switch to a previous Next.js version in eda4411

New logs

Error: The `app` directory is experimental.

Then I needed to enable the experimental appDir in next.config b45da2d

Last logs was the same that my initial issue

Error: page.tsx doesn't have a root layout.
Error: Command "npm run build" exited with 1

I gonna study next.js more in depth because I need a better understanding of the overall folder structure & behavior.