If you’ve been having problems loading a saved game since the June 3rd game patch, know that The Sims team is aware of the issue and are looking into it. In the meantime, the best thing to do is try playing a different save, or starting a new game.
I've seen a number of reports of the game crashing when attempting to load a specific save file. We're investigating, so sorry for the trouble. In the meantime please just hold onto the broken save and try playing a different save or starting a new game.
— SimGuruNick (@SimGuruNick) June 3, 2020