The only thing I can think of off the top of my head is try a Sims 4 factory reset -
Rename your current Sims 4 folder to Sims 4_Backup. - Renaming it will help have a backup and keep your Sims 4 files safe.
Repair the Sims 4 game. In Origin > Game Library - right-click on Sims 4 and select Repair.
Try playing the game, this will create a new Sims 4 folder. Try playing a new save, if everything is playing okay, try playing your broken game. If it's still giving you issues, then do not save.
However if it does work, then start putting the files back.
If all goes well with a new game. Copy your old saved games from your backup. (list of files and folders below).
- Options.ini (User game settings)
- Tray Folder (Sims/Houses/Commercial lots and rooms)
- Screenshots/Videos/Custom music
- Rest of the save games, if any.
(leave out slot_00000001.save which is the autosave. It is not used anymore.)
- Custom content like clothing, hair, skins, makeup
- Mods (Put these back one by one to make sure they all still work)
Please do test your mods and custom content, as some of them maybe outdated and either need to be deleted or replaced.
A list of some of the broken/updated mods/cc
http://forums.thesims.com/en_US/discussion/941998/broken-updated-mods-seasons-june-2018-patch#latestFinding Problem Mods and CC
http://simswiki.info/wiki.php?title=Game_Help:TS4_Finding_Problem_Custom_Content---
Resetting the game to factory settings without reinstalling
https://answers.ea.com/t5/Technical-Issues-PC/READ-FIRST-Troubleshooting-your-Game/m-p/3621199#Resetting