Here are some tips to try:
1. Move your mods folder to the desktop, clear your game cache and delete the localthumbcache.package from the Sims 4 folder to help with troubleshooting. Try playing the game again to test. If it loads okay, it may be that some of the mods/cc have become outdated.
How to Fix Problems with Mods/CC
http://www.carls-sims-4-guide.com/forum/index.php?topic=25031.msg426156#msg4261562. Making sure graphics drivers are up to date.
Finding devices and updating drivers on your PC
https://help.ea.com/en-us/help/pc/finding-devices-and-updating-drivers/After updating the graphics drivers, restart the computer.
3. If you have a dual graphics card system, make sure the game runs on the card and not the chip.
http://sims4.crinrict.com/en/2014/09/graphics-cardintel-chip-dual-systems/4. Turn off Origin in game:
In Origin - Application Settings - Origin In-Game. Turn this off. As sometimes it causes issues with the game.
5. Start the game in Windowed mode, via Origin:
In Origin > Games Library - Right-click on Sims 4 and select Game Properties.
In the Command Line Arguments, add the following text: -w and click Okay.
6. Try running Origin As Administrator:
Right-click on the Origin icon on the desktop and select Run as Administrator.
7. Log out of Origin. -- *If exiting Origin isn't working, open Task manager (Ctrl-Shift-Esc) search for a file called ts4.exe. Click on it and select end process.
8. Try a Factory Reset -- Sims 4 Factory Reset - HowTo
http://www.carls-sims-4-guide.com/forum/index.php/topic,21899.msg401669.html#msg4016699. If none of the above help, please share the information listed below about your computer.
How To: Find System Specs - Windows 10, 8 and 7
http://www.carls-sims-4-guide.com/forum/index.php/topic,21030.0.htmlSystem Information:
------------------
System Manufacturer & System Model:
Processor:
Memory:
Operating System:
---------------
Display Devices:
---------------
Card name:
Manufacturer:
Chip type:
Display Memory:
Dedicated Memory:
Shared Memory:
Current Mode:
10.) Restart computer if you haven't in awhile. This helps to refresh the computer's memory.
****>> If none of the above work, either post about your problem at answers.ea.com as they may be able to help you further with your crashing problem. (Link below)
EA Help - Answer HQ
http://answers.ea.com/t5/The-Sims-4/bd-p/The-Sims-4Or contact EA's customer service:
How to Use EA Help
http://www.carls-sims-4-guide.com/forum/index.php/topic,21898.msg401708.html#msg401708