Island Paradise doesn't show up on launcher and game won't load

I just recently uninstalled and reinstalled the base game, island paradise, late night, supernatural, and seasons.
After I installed seasons, the little icon on the bottom of the launcher for island paradise was no longer lit up. I have it downloaded, though...
Also, when I tried to start my game, it loaded for a minutes and then I got a message saying that it stopped working.
Thank you in advance for any help!

Mine was causing a similar issue. After I installed it the icon didn't show up, it just wasn't anywhere. So then I tried the ultimate fix and it ended up making almost half of my other expansions disappear. I tried re-extracting and re-installing and that paired with the second button on the ultimate fix helper did the trick to get them to reappear. Honestly it's my first time torrenting, and I have no idea what I did wrong, but that's what worked for me.

You might want to try following the instructions on the "how to install the sims 3 correctly" post, starting from step two. https://games4theworld.forumotion.com/t1171-must-read-how-to-install-the-sims-3-correctly Try the ultimate fix if that doesn't help.