My sims 4 keeps crashing on the loading screen

@AngryFemiKeagan  The driver for your graphics card is crashing, and if this is happening when you try to play, that would explain the problem.  So it's a good idea to do a clean uninstall and reinstall of the driver.  First though, please run a couple of basic checks on your Windows system files:

• Hit Windows key-X
• Choose either “PowerShell (Administrator)” or “Command prompt (Administrator),” whichever option is offered
• Inside the window that appears, copy and paste “DISM.exe /Online /Cleanup-image /Restorehealth” without quotes into the window, and enter
• The system will start validating soon. If it throws an error, please list it here
• After it reaches 100%, hit Windows key-X again
• Again, choose “PowerShell (Administrator)” or “Command prompt (Administrator)”
• Inside the window, copy and paste “sfc /scannow” without quotes into the window, and enter
• Post the message you receive here

If sfc reports that it found corrupt files and was unable to repair some of them, please stop here and let me know.  Otherwise, restart your computer, and download Display Driver Uninstaller from here:

https://www.wagnardsoft.com/forums/viewtopic.php?f=5&t=3480

Get a fresh copy of the most recent Nvidia driver here:

https://www.nvidia.com/Download/driverResults.aspx/176267/en-us

Next, take your computer completely offline—disable wifi and/or pull the ethernet cord—and double-click the DDU.exe.  Take note of where the file will land, and click Extract.  If it's easier, you can copy the path and then paste it into the address bar in a File Explorer window.  Open the folder and then launch Display Driver Uninstaller.exe, and you'll get a message that you're not in Safe Mode.  Click OK, then go to Options and enable Safe Mode dialog.  Here's a screenshot of what your options should look like; make sure the box in red is checked:

Close options, and the DDU, and then open the DDU.exe again.  For launch options, choose "Safe Mode (Recommended)," and then click Reboot to Safe Mode (you'll need your password, so find it before rebooting).  Once you login, you'll see this:

In the blue box, choose GPU, then Nvidia if it's not already showing.  Then click Clean and Restart (red box).

Once your computer has rebooted, now back in normal mode, run the driver install .exe in custom mode.  Select "perform a clean installation" and install ONLY the GPU driver and the PHYSX software.

Reboot again, go back online, and see whether the game works normally.  If not, let me know.