Solution for Main Menu Screen Freeze
You may have been experiencing some technical concerns with Sims 4 Game Patch. If you have noticed that you boot screen is freezing when you attempt to load the game, worry no more. Maxis QA team have come up with a temporary solution for the problem. By eliminating or retitling the screenshot folder, you should be able to continue playing the game without further issue.
After today’s Sims 4 Game Patch, players are reporting that the game freezes at the boot screen when loading up the game, and can take up to 10 minutes to resolve. SimGuruArvin and the QA team at Maxis are aware of the issue and state that the issue can be temporarily resolved by removing or renaming the screenshot folder.
To access your screenshots folder and resolve the issue, open up Documents > Electronic Arts > The Sims 4 > Screenshots and either remove the folder and save it on your desktop, or rename the folder all together. Note that the game auto generates new folders.
Source: The Sims