It doesn't give any technical details in the error, just that the download/install failed.
For the maps, I did download them from thesims3.com when I couldn't find them in the ea app, but if I try to install from the game launcher it says there are no packages to install. It shows in the Downloads but not in the Installed Content, and it doesn't show up when I launch the game and look through my available maps.
@ZhaoYiLi I can't help with the EA App downloading issue, but for the Store content, the "no packages to install" error has a known workaround:
@puzzlezaddict That fixed the Store content, thank you!
