Re: [ARCHIVED] Happy Home Login Event: Claimed items disappear
@Soanad if you're logged onto a different computer, the disappearance may make sense as rewards are entered into UserSettings.ini file. That's located in the main path Documents > Electronic Arts > The Sims 4 and should be found near or at the bottom. You can try to copy/paste your UserSettings file from one computer to another if you're using multiple. If you have a flash drive handy, save the file on one in order to transfer it.
For those of us using the very same PC, I suppose our issues with obatining rewards remain a mystery. Anyhow, you might try the copy/paste method. Perhaps it may return your acquired rewards to your second computer. Best luck.