I am also having this issue with purchasing addons and them not showing up as purchased in the library, specifically for Horse Ranch and Werewolves. Error Reporter code 2d54e67a-6ffa-4e6b-b25f-9a7b0ea7f7f2
I've cleared the cache and restarted the app multiple times. I've gone to manage addons and repaired the game. I've also opened the game, where the game shows the content has been purchased but not downloaded.
I'm getting tired of having constant problems with the EA App. If anything is going to make me abandon the Sims franchise, it will be the frankly embarrassing state of this app.
EDIT: Of course, as soon as I post this, the problem seems to have resolved. It took a very long time for the order acknowledgement to hit my email inbox, and I tried clearing the cache one more time after that and it seems to have been fixed. Maybe that is connected?