Re: Can't load old saved game

@dewdrops246  Are you saying you were able to load and play this specific save after installing Eco Living, but can't now?  If that's true, please first make a backup copy of your saves.  Go into Documents\Electronic Arts\The Sims 4, right-click on the saves folder, select Copy, then right-click on your desktop and select Paste.  You probably won't need the backup, but it's worth spending the 30 seconds to make one.

Please now manually restore a backup of the affected save, using the copy that's still in the Sims 4 folder in Documents\Electronic Arts.  Here's how:

https://sims4.crinrict.com/eng/2014/09/save-games/#wiederherstellen

Let me know whether any of the backups load for you.