After defeating the ginger school monitor boss, I open the door to the detention room and the cutscene where Craig and the kids in detention plays. Afterwards, the screen flashes to the boys outside the school for a split second and the black loading screen appears and doesn't go away. I still have access to the game menu but the text in the tip bar that rotates at the bottom of the screen look a bit off (ie. little black streaks in the text).
I've tried to switch buddies before entering the classroom, I've tried exiting the school and coming back after a few quests, I've even tried loading a 30 minute previous save. Nothing works. Since this is a game progressing cutscene, I can't progress further.
Thanks for your help in advance!