[PC/MAC] Game couldn't save due to error 13

I just got an Error Code 13 when trying to save my game. The game I was trying to save, is a new game on a new save file I just created today in order to play the Forever Friends event. I have no mods or cc. I believe I'm playing on a Windows 11 PC. I do own add-ons. I am repairing the game right now. I have 43 add-ons, which include: The Sims 4 Holiday Celebration Pack, The Sims 4 Spa Day, The Sims 4 Get Together, The Sims 4 Movie Hangout Stuff, The Sims 4 Dine Out, The Sims 4 Romantic Garden Stuff, The Sims 4 City Living, The Sims 4 Kids Room Stuff, The Sims 4 Backyard Stuff, The Sims 4 Bowling Night Stuff, The Sims 4 Cats & Dogs, The Sims 4 Parenthood, The Sims 4 Fitness Stuff, The Sims 4 Toddler Stuff, The Sims 4 Seasons, The Sims 4 My First Pet Stuff, The Sims 4 Island Living, The Sims 4 Discovery University, The Sims 4 Tiny Living, The Sims 4 Snowy Escape, The Sims 4 Nifty Knitting Stuff Pack, The Sims 4 Cottage Living, The Sims 4 Dream Home Decorator Game Pack, The Sims 4 Blooming Rooms Kit, The Sims 4 Carnaval Streetwear Kit, The Sims 4 High School Years, The Sims 4 Little Campers Kit, The Sims 4 Growing Together, The Sims 4 First Fits Kit, The Sims 4 Desert Luxe Kit, The Sims 4 Horse Ranch Expansion Pack, The Sims 4 Everyday Clutter Kit, The Sims 4 Simtimates Collection Kit, The Sims 4 Bathroom Clutter Kit, The Sims 4 Home Chef Hustle Stuff Pack, The Sims 4 Poolside Splash Kit, The Sims 4 Modern Luxe Kit, The Sims 4 For Rent Expansion Pack, The Sims 4 Lovestruck Expansion Pack, The Sims 4 Storybook Nursery Kit, The Sims 4 Artist Studio Kit, The Sims 4 Comfy Gamer Kit, and The Sims 4 Businesses and Hobbies Expansion Pack.

How did I encounter this? Today (Wednesday September 24th, 2025), I created a young adult sim, a child sim, and an infant sim. I started a brand new game on a new save file to work on the Forever Friends event. I managed to complete week one but decided to keep playing with the family I was using. I noticed things going wrong when I had used Cupid's Corner to find a sim to meetup with. My child Sim was at school, so I traveled to meetup with the sim I met on Cupid's Corner, that action sent my infant to daycare. At the meetup location the game was being slow and not responding. I would have actions for my Sim to do and she would keep freezing and just standing there not completing the action. I kept pausing the game and  un-pausing it and oddly enough it would help the sim finish the action she was doing. It still went slow though. Eventually I parted ways with the Sim I was hanging out with and went back to my Sim's house. My child Sim did homework, while my adult sim practiced sitting up with my infant sim and I noticed the game would make the (sound effect/music) and do animations as if my infant achieved the sitting up milestone but the popup notification saying the milestone was achieved never came, and my infant never sat up. I have my infant practice tummy time and a similar thing happened; the game acted as if the infant achieved a milestone but nothing happened. I also noticed my child Sim never got the "first day of school" milestone. I decided it was time to log off the game and try again later and that's when I discovered it would not save.