@graceymanors, if you haven't already, make sure nothing is blocking the dishwasher. Also, You can try to sell you dishwasher and replace with the same model (in case the current one is glitched). If the problem still persists, then you can try to have your Sims visit another lot (friend's house, library, gym, bar, park, etc) and then return.🙂 If you still have a problem you can move out your family and then move them back into the same house (this will fix a lot of problems!😇 ) And if you still have a problem, you can try to repair your game through Origin by going into Origin and clicking on "My Game Library" and then Right-clicking on The Sims 4 picture and choosing "Repair Game" in the list. (If you have expansions, you need to make sure it repairs those too, and not just the base game.)
Please tell us if you are able to fix the problem, and if so, what worked! 😉
If for some reason none of these suggestions work, please tell us so we can try to figure out what is going on in your game! 🤨
Best of luck! 🤞