Forum Discussion
@AmeliaSCooper As a test, please try playing in a clean user folder. Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop, and when you launch the game, if it launches, a clean folder will spawn with no content. (Your saves and other content will be intact in the folder you moved but temporarily not read by the game.) Don't add anything to the new folder yet; just let me know whether you can get far enough to start a new save and play in live mode for a bit.
You can ignore the unrecognized card message for now. It's easily fixed but also won't be contributing to the crashes; we can deal with it later if you want.
If the above doesn't help, please try playing while your computer is offline. You can sign into Origin or the EA App and put it in offline mode, then disable wifi and/or pull the ethernet cable before pressing Play. If your packs don't load, that's a known issue with the EA App, or at least it was recently. Please ignore it and just play a new save with the base game content; that's enough for this test.
If you get yet another crash, please run a dxdiag and attach it to a post.
https://help.ea.com/en/help/pc/how-to-gather-dxdiag-information/
Interesting, playing offline was OK, I used high graphics settings and went 20 minutes without a crash. I was in and out of building and CAS the whole time.