Welcome to the forum
@Glader01 First check that it isn't mods causing the issue, so take any you have out and test in a new game. You could also try taking control of another household and let them visit the lot to see if they can eat the cake. You could try saving all the items, house and sims to your library and starting a new game with them all, or moving the household to a new lot within the same game etc.
Loads of things you could try and the more information you can give us on what is happening and what you have already tried the better we can suggest something to help.