Cannot put 2 Sims in same University dorm

A quick update: I have taken all my mods out and the problem goes away.

But, other than the "allow stoves" mod causing issues with University Housing (a mod which I have never had), can anyone tell me what mods are known to cause issues with University Housing, please?

Any and all suggestions would be greatly appreciated, please! (I'm working three jobs at the moment so my free time is unfortunately very limited.)

The other issue I keep experiencing is that if I edit a University Housing lot, it then comes up as "incomplete", as the game fails to recognise that the items in the venue type checklist have been satisfied.

When I remove all my mods, this problem also goes away.

The mods I use area apparently all updated for the 7 December patch, but I know this doesn't mean they might not still cause issues.