When does Filch’s office unlock?

Unfortunately, you won’t be able to talk to her about what happened. To complete this task, you need to earn five stars within three hours. The best thing about it is that the stars earned here will count towards unlocking Stinksap lesson. To earn the final star needed to unlock Stinksap lesson, you can simply do a one-hour class to complete it quickly. Completing this lesson requires you to earn five stars within three hours. All of the stars are needed to pass, so having full energy when starting is highly recommended. Finally, you will enter and sneak into Filch's office.