I am experiencing the same errors:
2023-08-26 13:08:25.080930-0400 TestApp[8604:629650] [core] Attempted to register account monitor for types client is not authorized to access: {(
"com.apple.account.iTunesStore"
)}
2023-08-26 13:08:25.080969-0400 TestApp[8604:629650] [Default] <ICMonitoredAccountStore: 0x2826bf060> Failed to register for account monitoring. err=Error Domain=com.apple.accounts Code=7 "(null)"
Confusing part is I AM ABLE to load my playlists, the songs within each playlist, and all songs in my library. I am also able to play songs without any issue. The errors seem harmless for my use case, but does anyone know if I will have problems going forward? Or better yet, how to resolve these "errors"? :)