Child account - Invalid Apple ID
I set up a child account for my daughter yesterday. Today, she is being asked to type her apple ID password but in doing so gets a message that the Apple ID is invalid. I have no way to reset it. I still see her set up on my iCloud settings and did not receive any notification that her apple ID was being disabled. Last notification is yesterday’s noting her ID had been set up. Can someone assist please? Thank you
iPhone 7