Re: Kid's and teens can't eat plates of food?
@graceymanors I've seen this occasionally, but only with one kid at a time, and I'm not sure there's a pattern to what types of food are affected. I've always addressed it by dragging the plate to the fridge and replacing it on the counter or in a sim's inventory. Does it matter who cooks the meal, or where it's been placed? Or perhaps whether it's cooked in the oven rather than only on the stovetop? I've also seen errors when a sim takes a serving plate out of the oven, especially (but not exclusively) when the game was saved while the sim was already cooking.
If you've tried a clean folder, that would take care of the cache files, as well as any mod-related issues (as long as your clean folder didn't initially have mods in it).
As a side note, I'm surprised that you have SP and Overwatch, but not ErrorTrap or MasterController. In your position, I'd go around doing manual resets of the fridge and counters, the entire lot, and then maybe a kid or two to see if it helped. But if you don't want to do that, I'd evict the family in Edit Town, save the house to the bin, bulldoze the lot, replace the house, and then move the family back in. As long as you did it all in one Edit Town session, your sims wouldn't lose their jobs or relationships, just their promised dreams and opportunities.