@Queeneson
Did you make sure to unzip the .package file first? I noticed some mods will download as a .package but still needs unzipped.
@fiercephoenix91
I would like to add to this post that I recommend backing up your save files (copy save folder to anywhere except EA, Maxis, and Sims 4 folders) in case a save might go corrupt. Save your custom lots and household(s) to your library as well so you can access them in a new save easily. Do this every so often. I have a rotational save and would cry if all the hours of work I've put in the game would disappear.
Before installing an EA update, uninstall mods (just drag and drop the .package/.script files to your desktop temporarily), restart your game, and then exit out and download the new update. Start your game again without mods, then exit out again. After everything is working, take those files you put on your desktop and drag them back to your mods folder. Restart game and make sure everything is running with the mods. Tah dah! So far the only mods I have are ones that fix glitches, so hopefully eventually I won't have to have mods anymore! One can hope.