[DU] Can't get the invitation to trigger for the secret society...

My sim makes a high quality offering to their academic statue, goes home, and at night goes to sleep. Between 1am-3am two sims show up on the lot in regular clothes, not robes. When I hover over them it says 'secret society member'. All they do is come inside, one goes on the computer, the other opens the fridge, then they both leave immediately after. I have no mods or cc, I ran the game repair, it still doesn't work. I've also tried doing it on different sim days and every time the same sequence happens.

other relevant sim/game info:
This sim is attending Britechester, in the Language and Literature distinguished degree, a member of the soccer team, and a spell caster.

Edit By Crinrict: Added Tag to Title.