Try resetting your user files as described in the factory reset described in this post: http://answers.ea.com/t5/The-Sims-4/FAQ-Troubleshooting-Steps-amp-Known-Issues/m-p/3621199
You won't loose anything. Just make sure to not delete any files and make a backup.
After renaming, repair your game by right clicking on the game in Origin.
Try on a new game with nothing added back first (start new game). If it works, put back your save game and try again. If it still works, you can start putting stuff back.
Options.ini (or just re-set all your settings manually)
Tray Folder
Screenshots/Videos/Custom music
Rest of the save games (leave out slot_00000001.save which is the autosave and no longer needed - if you still have it)
Custom content like clothing, hair, skins, make up ....
ConfigOverride, if you have your own configuration files.
Mods (one by one, making sure they all still work)
The rest does not need putting back, cause they are mostly cache files that recreate or log files that are not needed for the game.
If this fails, please add some pictures to your thread and please also edit your post to fill in the template. If you're not prompted, please answer these questions.
Product: The Sims 4
Platform:
Which language are you playing the game in?
How often does the bug occur?
What is your current game version number?
What expansions, game packs, and stuff packs do you have installed?
Steps: How can we find the bug ourselves?
What happens when the bug occurs?
What do you expect to see?
Have you installed any customization with the game, e.g. Custom Content or Mods?
Did this issue appear after a specific patch or change you made to your system?
The bug template is currently working on/pff but it helps if you are not prompted for the template while editing, please answer the questions anyways.