Apple Music
why can't I join my family subscription for apple music
iPhone 8, iOS 15
Question marked as
Top-ranking reply
Did he send you an invitation join the family group and did you accept it? Also see the 'If you can't accept the invitation' section in:
Set up Family Sharing - Apple Support
Does the Family Organizer have a Family subscription to Apple Music?
Get an Apple Music family subscription - Apple Support
If so, you might be able to fix your issue by turning Sync Library off for all of your devices, then turning it back on again. Learn how.