rosiemoore74 Please open Documents > Electronic Arts > The Sims 4 and delete any lastexceptions you see. Try again to load the save, without mods, and when it fails to load again, look for a new lastexception. If you find it, open the file, copy the text, and paste it into a reply here.
ShinyGeodude Would you be willing to share your save? We're looking to collect saves with exactly this issue, and the more we get, the better. I would only share with Maxis and possibly one other helper, if she's interested. If you're willing, upload your saves to a third-party filesharing site (Google Drive, Dropbox, etc.) and either post the link here or send it to me via PM. If you use Google Drive, make sure "anyone with the link" can download the files.