HikariHinoki Thanks for the dxdiag, which lists a couple of serious crashes of the graphics driver. While it's not clear from the dxdiag whether these happened as you were playing Sims 4, they should be addressed regardless. So please do a clean uninstall and reinstall of the Nvidia driver, as described here:
https://crinrict.com/blog/2019/02/clean-re-install-of-graphics-drivers-with-display-driver-uninstaller-ddu.html
The Sims 4 errors are somewhat generic, but one cause of this type is a somewhat corrupt lot. So if reinstalling the driver doesn't help, please let me know whether this happens on new lots you test with, ones where you've never built or placed an existing build from your Library or the Gallery. As in, the lot is currently exactly as it appears in a new save. If you still have the same issue, please test with an actual new save too.