@GabsandCody19 If you're still getting an error when you remove the Mods folder completely and delete localthumbcache but not when you turn mods/CC off, perhaps you've got two different Mods folders and the one you removed isn't the one the game sees.
Here's how to make sure you're using the right mods folder: https://sims4.crinrict.com/eng/2018/07/how-to-find-your-user-folder/
Here's where to go if you've got OneDrive and need to get Sims things away from it, because it can cause folder problems: https://answers.ea.com/t5/Technical-Issues-PC/CURRENT-ISSUE-Sims-4-saves-user-content-disappearing-PC/td-p/12475370
If a mod or CC is causing your errors, you can still play with mods and CC! You just need to find which one is causing your issue and either delete it or, if there's an update available, update it. If you use a lot of mods, I'd suggest starting at the Broken/Updated Mods list. If you use mostly CC, a better starting point is to isolate your broken CC using the 50-50 method, with these instructions: https://answers.ea.com/t5/Mod-CC-Issues/INFO-How-to-Use-Mods-and-CC/m-p/13439356#FiftyFifty
