Sims 4 crashing and stuck on save
@ItsMeDanielllle Your dxdiag lists a pile of crashes of a component of the Nvidia graphics driver, so I'd suggest doing a clean uninstall and reinstall of the driver even if you're not currently seeing any issues. Here's how:
The virtual monitor software you're using could intefere with Sims 4 as well, although it might also be fine. If you do see more issues and reinstalling the graphics driver doesn't help, I'd try shutting down this software before playing. Go through the Task Manager's background processes list to make sure nothing related is still running.
The inability to tab out of Sims 4 is a known issue with the DirectX 11 version of the game. Some people report that playing in windowed mode, either standard or "windowed fullscreen" (i.e. Borderless) helps, but others say it doesn't. Regardless, the problem should be addressed sooner or later since this is a basic function.
For build issues, I really have no troubleshooting skills at all. You'd be better off posting in Game Issues just for this, that is if you run into the problem again. A couple of helpers there have a good idea of how to force Build mode to work, at least as well as it can.
