Sims stuck in T-pose since character creation

I play the Sims 4 on mac, my brother and I use the same account to play. He downloaded the game started a new save on the vanilla game. Lo and behold, the first thing he was greeted by was this.

We both dismissed it as a minor issue and thought it was hilarious. During CAS, the sim kept cycling through the usual animations and promptly snapped back into t-posing as soon as they were done. When he moved the newly-created sim into the game proper, the sim could walk, eat, etc. as usual, but the sim's portrait on the UI was stuck permanently in a t-pose, just like during CAS (No screenshots of this particular issue, sorry). This apparently resolved itself when the sim got stuck in front of the TV. We tried to reset the sim to no avail, at which point he decided to start a new game, which suffered the exact same issues. We tried to repair the game, take the folder to the desktop, etc.. So far the sim is still stuck in front of the TV adamantly refusing to go anywhere. I've searched the forums and I'm not sure if anyone else is suffering from this specific issue, but please send help.