Emily2007 I'm really glad that it worked without mods. That just means one or more of them are broken and not compatible with the current version of the game. You just need to find the ones that are broken. This thread will tell you which ones are broken.
Broken and Updated Sims 4 Mods and CC: 1.116, July 1, 2025 Game Update | EA Forums - 12291193
However, 2,500 mods is a lot to sort through. So, you're probably better off doing a 50-50 test to find the broken ones. Click on this link and scroll to the 50-50 Method to see the steps for how to do it. This may also take some time but it will be worth it to fix your game and to keep the mods that are still working properly.
[INFO] How to Use Mods and CC | EA Forums - 9360653