ducky0105x Can you load another household in this save? If not, what about a new household in a new save? Please test and let me know.
If you can't load a new save, 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.
If only your main household is affected, please open Documents > Electronic Arts > The Sims 4 and delete any lastexception files you find. Try again to load your main household, with no mods or custom content present, and if it doesn't work, look for a new lastexception. If you find one, open it, delete the first line of text, and attach it to a reply here as described above.