Try to look for mods that might be interacting and move them higher up. Mods higher up in the list will load first. Normally it's extremely difficult to change that when installing them manually, but it's very easy in CC Magic.
Keep in mind that mod load order can cause game load crashes if they're loaded in the wrong order. This program will automatically remove any mods that are corrupted or meant for another game and it'll load the ones you have in a way that is far less glitchy and that loads into the game better.
The traditional mod framework is unreliable and often fails for no discrinable reason.Äownload it and install it, Then move your currently installed mods to the "Downloads" folder and then run this program and press the "rebuild" button. One other tip I can provide you right now is to change the way you install your mods. If there's already a shortcut for the game made my Steam on your desktop, delete it in favor of this one. Go to the desktop and to this shortcut and rename it "The Sims 3" and then just use this shortcut to launch the game from now on instead opening the launcher through Steam. Right click it and go to "send to" and then "desktop (create shortcut)". Steam\steamapps\common\The Sims 3\Game\Bin
Navigate to where Steam is installed and then go to the folder: Instead, don't even bother with that glitchy mess of a launcher. and half the time I try to use it to start the game, nothing happens when I press the play button. It sounds like you're starting the game through the launcher.