Family sharing error
I’m in family sharing and Apple Music and other subscriptions are not working I got an error code when wanting to accept invitation.
iPhone 11, iOS 16
Try restarting your device. That often clears up mysterious issues.
If you still have questions or problems:
Refer to this document for ways to contact Apple --> Choose your country or region - Official Apple Support
Select your country (also look for "other" regions), then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.
or:
Contact Apple for support and service by telephone --> Contact Apple for support and service - Apple Support