Solved
Sims 3 Worlds - Unable to Install
Recently I had to reinstall the game and all of the extras from the store. Before downloading any Store items I made sure the game was fully installed and updated and super-patched. I have no issue...
And apparently nevermind.
Moved my Mod folder out while attempting the install (I will not play without NRaas mods, they help make the game that much more enjoyable) and attempted the install. No issues this time.
