Saying family sharing is full, but it isn’t
I have the 2 Tb iCloud plan and I’m sharing it with my wife and my mother who we’re visiting now and I wanted to check that it was working with her. Seems like she hadn’t activated/accepted it, so I did that and started a backup of her iPad which worked well, but when I tried that on her iPhone, it only says that the family sharing is full and that she could ask me to purchase a better plan. Well, there isn’t any better plan and it’s far from full since it’s around 1,5 terabytes left of free space, so how do I fix that?
iPad Pro, iPadOS 16