Facebook sharing worked fine for me in the beginning. About a month or 2 ago it wouldn't allow me to change the sharing status of the post to "public", even though I would change it from "just friends" to "public" before sharing the creation. After the update before the most recent one, the connect to facebook icon has been greyed out, and when I hover over it to try to connect it says what the title of this thread says. I haven't been able to find a solution to this problem, and came to the forums to ask for help on the same thing.
The problem seems to have gotten worse since the last update. When ever I start the game I have trouble logging on to the Sims 4 site. I will wait and wait and then it will say "you are offline." I click there to go online and it just spins and spins, I have to restart the game over and over until it will finally connect me so I can view the current gallery things. I do have a couple mods and a few CC items, I took those out and still the same problem. (Edited because I noticed I put Sims 3 instead of Sims 4. Whoops)