Prom missing from calendar and not triggering – PS5

I’m playing on PS5 and the Prom has completely disappeared from my game. It’s just not on the calendar anymore and I don't have any social interactions to invite other Sims or anything.

​The weirdest part is that from time to time on Saturdays, my teen Sims still get a phone call from NPCs asking to hang out before the Prom. If I say yes, a few teens show up wherever my Sim is currently at, but they just leave immediately as soon as they arrive. After that, nothing happens. No notification to go to the auditorium, no Prom, nothing.

​I use my main account to play while the packs were bought on a second account via console sharing, but I've already tested playing directly on the buyer account and the bug is exactly the same there too. It’s super frustrating because the game seems to know it’s Saturday, but it can’t launch the actual event.