"Can we go to the Great Hall from here?"
Translation:naDevvo' vaS'a'Daq majaHlaH'a'?
You're correct on all counts. It's from a joke in Power Klingon, and it contradicts what was later learned in an interview with Marc Okrand on the nature of verbs whose objects have a locative sense built in. Your version is correct. However, until Okrand tells us that the PK version is outright wrong, it must be accepted as a valid thing to say.
It is a terrible sentence to put in this course for this reason.