Whether you’ve been along for the LEGO Harry Potter journey since the beginning or if The Great Hall marks your first foray into Hogwarts, the building experience is a delightful journey for ...

You need to gain access to a secret hall nearby, which is done by casting Depulso on a wall a few floors down from where you start the Side Quest. The objective marker will highlight it for you.

Given Hogwarts Legacy's huge open world, it's possible that players may have missed some of its more secret locations.