[CC and Milestones, error code 110-578ef827] Stuck On Loading Screen Sims 4

Hi,

I have four active save files right now, and I'm able to open all of them except for one. I'm able to load the world screen, but once I try to actually play with the family, the loading screen won't go away. I've tried moving my Electronic Arts folder to my desktop, removing all of my mods, repairing the game in the EA app, deleting any last exception packages and more, yet, I can't get it to work.

Not sure if this is worth adding, but the last few times I've tried to play this family, I go into the folder and saw a lastexception.txt file and it mentioned something about a "developmental_milestone_tracker.py"

Thank you.