What I want to fix is that there is an action that the game is unable to carry out, relating to roommates, which then causes the game to freeze for a period of time before resetting whatever is trying to do the "Roommate Get Hype" action.
I have no idea what this interaction may look like or what comes before.
I use uni dorms. Uncontrollable sims refers to sims not in my active household (guests, roommates etc).
If not a fix, I just want to know if my save is doomed, or if that MCCC helper was over exaggerating