Of course, there are many reasons why the game can crash – out of date CC/Mods, corrupted save, gameplay bug, low spec. machine, Origin in-game enabled, lots of different reasons. One of the current reasons since the December patch is down to the user’s Origin avatar. We have had this before but it was fixed a few months ago.
If you have a lastCrash.txt file in your Documents > Electronic Arts > Sims 4 folder open it up using TextEdit and look for the category ID. If it is the 0xf19b10 error code it means your crashing is caused by your Origin avatar:
To fix it open Origin, click on your profile in the bottom left corner then click on the orange button saying Edit on EA.com next to your profile image in the main window. In the browser window that opens click on your profile picture and choose a new avatar. You can upload your own or choose one from the avatar gallery.
Once you have changed it quit Origin and restart and you should be good to go.