I try to do a route on my application but I have this message when I refresh page:
Unexpected Application Error!:
404 Not Found
???? Hey developer ????

You can provide a way better UX than this when your app throws errors by providing your own ErrorBoundary or errorElement prop on your route.

Link on my github project : https://github.com/Draqon3k/LABSTWEB

I try to do a good routing