Bugs in Tutorial CI4

hmm, when I want to Route '/' to welcome_message, I use in Routes "$routes->get('/', 'Home::index');"
But then it always crashes when I use methode save in "news/new" View
If I remove "$routes->get('/', 'Home::index');" like in Tutorial, what do I need to add to Routes to load welcome_message as default for "/"

Sorry, I'm very Newbie

---

got it !!
in routes I added
use App\Controllers\Home;
that's it
Missing that in Tutorial or not seen