Sunlit Tides trouble

Hello,
I have recently tried to download Sunlit Tides, however whenever it opens in the launcher, the installer states that it was unable to install and that I need to make sure that everything is updated. Before trying to install the world, I had already downloaded the new patch for the game as well as downloading the ultimate fix for it. I've tried just about everything that I could find in other forums including deleting caches and putting it in the right downloads file, but alas, it still comes up with the same error. I've tried downloading other items using the launcher and they download just fine, so the problem only happens when I try to download Sunlit Tides. Is there any way I can fix this or just bypass the launcher completely by downloading a package file? Help Please! Thanks.

Hello,

You mean something like this: https://games4theworld.forumotion.com/t1212-how-to-start-the-sims-3-without-the-launcher-fix ?