The Sims 4’s latest Update brought tons of new features! Now when you open up your game for the first time after updating The Sims 4, all your Mods / Custom Content that you may have installed in your Mods folder will automatically disable!
To re-enable all your Mods and Custom Content, select the Settings option in the Menu and select Settings. Under the ”Other” section you’ll find the ”Enable Custom Content and Mods” option. Check it and restart your game in order for it to take effect!