I had the same issue. I created another thread (now closed) because I wasn't aware of this part of the forum until I stumbled upon another post somewhere. My game literately was working fine last night, I went to login this afternoon and Origin went offline and said a critical update went live yesterday. I posted this earlier but it disappeared. If I see both posts, I'll delete the older one.
Product: The Sims 4 (with all expansion packs)
Platform:
Macbook Air (2017)
Mojave 10.14.4
1.8 GHz Intel Core i5
8 GB 1600 MHz DDR3
Intel HD Graphics 6000 1536 MB
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? TBD
What expansions, game packs, and stuff packs do you have installed? All of them
Steps:
How can we find the bug ourselves?
1. Install latest origin update
2. Load Sims 4
3. Modify a sim in CAS or open the sims family manager
What happens when the bug occurs?
See screenshots.
What do you expect to see?
I expect to see the UI component.
Have you installed any customization with the game, e.g. Custom Content or Mods?
Not on this machine
Did this issue appear after a specific patch or change you made to your system?
Most recent Origin update.
STEPS I'VE TAKEN:
1. I have attempted to clear the cache and other temp files
2. Confirmed I haven't downloaded any mods
3. Started a new game
4. Reset the game
I'm going to attempt some of the fixes here in this thread, but wanted to share some additional info since others were also having this problem.
EDIT MAY 27, 2019 -- 7:11 PM CST:
I'm not sure if it helps anyone else, but after trying the repair tool and reopening the latest installed origin, it appears that it forced my Sims game to update. Origin was set to auto-update on my mac, but maybe this last update it ran into a problem and it bugged out (I will note that I ran into an issue where it did "update" but it took a LOT less time than normal). Went through the process of letting Origin update all of my Sims game (took about 5-10 mins) and it appears that the issue persists.
EDIT MAY 27, 2019 -- 7:23 PM CST:
I've removed all of the items as suggested by @crinrict. Started a new game after removing all the save files and noticed that it was working correctly. Re-added the saves and the issue reappeared. I tried repairing the game and no mas. Any suggestions on how I can save the file without losing all progress?