Unable to select traits in CAS

Product: The Sims 4
Platform:PC
Which language are you playing the game in? French
How often does the bug occur? everytime
What is your current game version number? 1.119.109.1020
What expansions, game packs, and stuff packs do you have installed? all expansions, all game packs, all stuff packs but My First Pet and kits such as Secret Sanctuary, Artist Studio, Storybook Nursery, Riviera Retreat, Castle Estate, Goth Galore, Book Nook, Grunge Revival, Basement Treasures, Greenhouse Haven, Simtimates Collection, Little Campers, Moonlight Chic, Decor to the Max, Carnaval Streetwear, Blooming Rooms, Fashion Street, Courtyard Oasis, Coutry Kitchen, Essential Glam, Kitchen Clutter, Sleek Bathroom, Cozy Bistro, Modern Luxe, Desert Luxe and Country Kitchen.
Steps: How can we find the bug ourselves? choose the "new save" option to get into CAS (or just go into CAS, I'm not sure if it does the same on active saves)
What happens when the bug occurs? when I decided to start a new save the traits UI won't appear. thinking this must be a mod causing this I took them out gradually until all of them were out of the mod folder, yet the issue persists no matter what. from another player's suggestion I uninstalled my game before reinstalling it then putting my game folder containing my savefiles back (without the mods, mind you). once I did all of that the traits UI in CAS was back to normal, until I pu back ONE mod (Helgatisha's Stand Still in CAS mod to be specific) just for the issue being brought back and not showing up again even with no mods on just like it was before uninstalling the game.
What do you expect to see? to get the traits UI back.
Have you installed any customization with the game, e.g. Custom Content or Mods? I did at first but the bug persists even after removing the mods.
Did this issue appear after a specific patch or change you made to your system? not that I know of.