The trailer for 'Fantastic Beasts: The Crimes of Grindelwald' was released and fans spotted a plot hole.
The film begins at Hogwarts with members of Ministry of Magic apparating onto school grounds.
This was a huge mistake, because JK Rowling makes it clear in the book that Hogwarts is an apparate-free-zone.
Fans have gone in a frenzy on Twitter pointing that out.