Added stuff from sims resources sharing thing and now it won’t launch

blu1103​  I'm glad you got it fixed.  In the future, you may want to test any new content in a clean user folder before adding it to your main one.  If you remove or rename the Sims 3 folder in Documents > Electronic Arts, then open the launcher to create a new one, you can add content to the new folder and see what happens without affecting the old folder at all.

When you're done experimenting, you can delete the new Sims 3 folder and restore the old one, then add any content that is in fact fine to your main folder.