This game does not have a multiplayer mode on any platform, including PC. It's strictly a single-player experience.
If you're looking for a Harry Potter game with multiplayer, you might consider:
* Harry Potter: Hogwarts Mystery (mobile game with asynchronous multiplayer elements)
* Harry Potter: Wizards Unite (AR mobile game with real-world interactions)
* LEGO Harry Potter: Years 1-4 / Years 5-7 (console games with local co-op multiplayer)
Let me know if you have any other questions!