https://nextjs.org/learn/dashboard-app/creating-layouts-and-pages i follow this tutorial to learn next.js. but the nested routing system does not seem to be working.

(https://i.sstatic.net/Z4p7hXsm.png)
i nested my folders as shown in the above image
i created a folder named dashboard. and created a page.tsx file inside it. like this:
(https://i.sstatic.net/9oBFCWKN.png)
and this is the content of the page.tsx file inside the dashboard folder:(https://i.sstatic.net/gZb83zIz.png)
but when i go to the link localhost:3000/dashboard, i get this error:(https://i.sstatic.net/6Q2InBMk.png)