GothicSimmer21 Does this happen only when loading one household in one save, all households in one save, or a new household in a new save? Please test other households and a new save if you haven't already.
If the new save at least is fine, I'd like to see a lastexception from your main save. Open Documents > Electronic Arts > The Sims 4 and delete any lastexception files you see. Try again to load this save, and if and when it doesn't work, look for a new LE. If you find one, open it (Notepad is fine), copy its text, and paste it into a reply here.
If the new save doesn't load, 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.