Yes , another black screen post...

IvyYuuki​  Have you tried removing the entire Mods folder?  If not, please do so now.

The next step would be playing in a clean user folder.  Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop.  When you launch the game, a clean folder will spawn with no content.  (Your saves and other content will be intact in the folder you've moved but temporarily unread by the game.)  Don't add anything to the new folder yet; just start a new save and see how it runs, that is if you can get that far.

If that doesn't help either, please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.

ive tried to remove the entire mods folder , didnt work. i then used a clean folder and still got the black screen . I can provide a dxdiag but will that share any information i wouldnt want online etc? 

IvyYuuki​  The only possibly personal information a dxdiag contains is the machine name and ID near the top.  You can edit those out if you want, but they're not inherently dangerous; it's just that you might have renamed your computer to something personal.  The rest of the dxdiag is safe to share, in fact that's why we're allowed to ask for them on this forum.

If you like, I can tell you when I've seen the file and you can take it down again.  But you're not putting yourself or your computer at risk by leaving it up.

ooo thats fine then!

IvyYuuki​  The type of Sims 4 error in your dxdiag is pretty generic, but the main cause aside from ones you've already addressed (mods, a broken save) is an issue with the graphics driver.  However, your dxdiag crashed while running as well.  This could be a random fluke, but it could also point to a more general system issue.  So please run a couple of basic checks of your Windows system files:

• Click Windows key-X and select "Powershell (Administrator)" or "Windows Terminal (Administrator)" , whichever you see
• In the window that appears, copy and paste "DISM.exe /Online /Cleanup-image /Restorehealth" without quotes, and enter
• The system will take a little while to validate; if it throws an error, please list it
• Otherwise, copy and paste "sfc /scannow" without quotes into the window, and enter
• Post the message you receive

Restart your computer, open Windows Settings > Update & Security, click the box to check for updates, and if any install, restart again afterwards.

You can try again to play, still with a clean user folder, but if that doesn't help, I'd suggest doing a clean uninstall and reinstall of the graphics driver.  Here's how:

https://crinrict.com/blog/2019/02/clean-re-install-of-graphics-drivers-with-display-driver-uninstaller-ddu.html

Rather than using the very newest driver from Nvidia, try a slightly older one.  You can always update later, but going backwards would require another clean uninstall.

https://www.nvidia.com/en-us/geforce/drivers/results/257496/

This is the result from doing the terminal fixes 

IvyYuuki​  That's fine, sfc did its job.

I had this issue and it turns out the mods listed below (Especially UI Cheats Extension) was causing the black screen for me, also double check if you have Onedrive because it will cause a lot of drama and issues for you.. I deleted it and apparently it still exists on my PC  

i uninstalled onedrive and also my ui mods but still no luck but thank you

so ive checked all updates and im up to date , i then did a clean folder to no luck and then did the driver uninstaller and reinstalled an older version, no luck at all . thank you so much for trying to help me