Using the default Ember router.js fails with 'BUG: Missing owner'

[Jopie01]

It's just a brand new app with

npx ember-cli@latest new new_fancy_app -b @embroider/app-blueprint --pnpm --skip-git --skip-npm

I created manually a new route in the app/routes directory. But then I got a console error

Uncaught (in promise) Error: Assertion Failed: BUG: Missing owner

But I also had something saying expected EngineInstance as owner. Looking at the documentation https://github.com/embroider-build/embroider?tab=readme-ov-file#compatibility I noticed that with lazy engines you have import the router from Embroider rather then from Ember itself. So that's what I did and then it worked perfectly.