[MOD RELATED] Icons are blank squares/ UI Glitching

ok so my two teen sims went to the pre-prom get together like normal, and then the "prom is about to start" pop-up appeared. i clicked "choose sims" and it sent me to the loading screen for a long time before taking me to the 'choose worlds' screen. if i click on the household i'm playing as and select to play as one of my teen sims at the auditorium, it loads and then sends me back to the 'choose worlds' screen. if i choose to play as either the dad or the little brother, who are not teens and are both at the house, it brings me to the house, but the ui is all screwed up. the first image is the less extreme example and is the one that happens most often- where the sim panel in the bottom right corner is covered up by this image of a completely different sim (idek who that guy is, i don't think he's in my world) and the spot where the moodlets should be is covered by blue squares. in the second image, which has only happened to me a few times, the ui is even worse, with this really weird incoming phone call that i can't answer or exit out of. if anyone has had this happen to them before, please tell me because i've never experienced anything like this-