Event panel glitch and prom

Is this glitch only happening to me? We're on a hangout and the event panel looks like this. This is also the case without mods.

Also, the prom doesn't appear on the calendar at all. Sims can't go to prom on Saturdays. I ran the game without mods, but it didn't work. I repaired it, but it didn't work. I deleted and reinstalled the hsy dlc, but it didn't work. I disabled auto-age, but it didn't work. I'd be very grateful for any advice on this, too. I've tried everything, but I can't find a solution.