Re: Sims 4 saying I need a pack I never owned
@randadean99 Get to Work is included with an EA Play subscription, which in turn is offered with XBox GamePass Ultimate. Is it possible your sister bought a subscription or redeemed one, and now that sub has expired? That would explain how she'd played with GtW despite not purchasing it.
If your sister isn't sure, please have her look over an online guide covering GtW's content. Ask her if she recognizes any of that content, if she happened to have it in her game at some point. It would be extremely strange for the game to think that a save that had never been exposed to a given expansion needs that expansion in order to work, but people buy and cancel subscriptions all the time.