Invisible sims make it impossible to travel!!

Hello, this is my first time posting on here so please excuse me if I'm not exactly clear. About a year ago my game was in a horrible state. Every time I wanted to travel with my sims, the game would freeze, I would have to force quit, and I would lose all of my progress. After a while though I figured out that the travel screen only froze if, 1.) there was an invisible sim on the lot or, 2.) the box at the bottom of the screen with your sim face is invisible. I don't really know how to explain it, but I did find a solution last year on an old forum. It had something to do with the slice of life mod or something, but my new mods folder doesn't have that. Does anybody know of any mods that is causing this?