Re: after recent patch (9/20/21) live mode will not work?

@iiaziineii  Your saves, builds, and other user content are stored in the Sims 4 folder in Documents\Electronic Arts.  This folder can be backed up and moved elsewhere, then put back when you want.  So you if you do uninstall and reinstall the game, just back up or move this folder, and restore it after you've confirmed that everything works correctly after reinstalling.

However, before you reinstall, try moving this Sims 4 folder and playing in a new one.  You won't have access to your saves or other content, since the game can't read the folder if it's not in Documents\Electronic Arts, but you won't have deleted anything.  Just test a new save and see whether you can get to live mode.  If you can't, then go ahead and try uninstalling and reinstalling.

If live mode works in the clean Sims 4 folder, you can start moving your saves and other content from the old folder to the new one and testing.