This is The Sims 4-board, are you talking about that or The Sims 3?
Anyway, if your game does not start with mods in it, you probably have some that are broken.
Remove all of them to see if the game works better.
For example, move the mods folder from C:\Users\Username\Documents\Electronic Arts\The Sims 4 to your Desktop and start the game. (or wherever they're in the Sims 3 if you're talking about that)
For Sims 3 I recommend this tutorial: https://sims3.crinrict.com/en/2011/01/tutorial-how-to-get-rid-of-unwanted-custom-content.html
If that works but you want to keep your mods, you can try some different things to sort out the ones not working: