I can cook using all the other methods just fine. Only the Microwaves. Whether the command is iniatied from the fridge or the microwave to cook something that requires the microwave.
Completely fresh game. I always delete all my saves after patches to avoid issues.
And if the tray folder is located at C:\Users\ USER NAME\Documents\Electronic Arts\The Sims 4\Tray
I have a total of 49 files there.
3 HOUSEHOLDBINARY Files
3 TRAYITEM Files
37 SGI Files
6 HHI Files
EDIT -
I went back in the game and was able to reproduce the issue again with another new household. I can also cook meals that require the stove with no issues at all.
I can add that after you interupt whatever is being cooked in the microwave, when you click "Resume Microwave Dinner" Or Empty (Insert Microwave Name)" The sim will not go back to the microwave and instead queue washing dishes and walk to the nearest sink with nothing in hand.
They perform no animations in front of the sink. They just stand in place a quick second then clear their queued actions.