Hi there!
A lot of these problems are usually associated with Custom Content and Mods. Before you do anything, please can you tell me what type of computer you are using (Ex. Mac, Windows), the specs of the computer, and the OS (Ex. MacOS Sierra, Windows 10) of the computer as well. This is very important because some computers are not supported by The Sims 4, and/or the specs are a little too low for The Sims 4 to run on. After doing that, make sure that you try and move all of your custom content to a different folder in your desktop. If it still doesn't work, then try re-downloading The Sims 4 or remove The Sims 4: Parenthood and try launching up the game again.
Have a good day!
