Music library not syncing

I solved iCloud Sync issues. First: turn off Sync auto-downloads and second: stop and remove local Music copies. Apple support helped me to locate and delete 200 GB in two (2) useless copies of my own 80 GB personal music that I stock from iTunes Store, over the years and decades. You need Sync to manage playlists once download squirrel holes are plugged.

Music preferences are opened and we unselect 3 defaults to disable Apple's squirrel holes:

1. Advanced › Add songs to Library when adding to playlists (important, uncheck this first)
2. General › Automatic Downloads
3. General › Always check for available downloads

Now use Apple Music Browse to drag and drop albums and songs into playlists. Those playlist selections will auto-sync.

There was a massive "genius results" outage that was just resolved.... well kinda. You can sync again but it seems that it's causing a lot of duplicate playlists and songs to show up for some (many?) people.

see the issue on the main page: Apple Music Sync Error: 'Genius results can’t be updated right now. The network connection was lost.'

By the way authorize is like falling into the squirrel hole. If you avoid that level of contamination (sorry Apple, we know the truth hurts and we know you just want to make our lives easier), then instead of bogus authorization (that I abandoned four months ago), you still get endless Doofus popups until you manage playlists and downloads as described above.

Even I have the same issue. If anytime you get your problem solved then kindly share the steps you followed to solve it.

Thanks

Exact same error on my Macs running Big Sur. Nothing helps. Reading through other threads it's not only limited to one country.

^This worked. Note, if, like me, "Add songs to Library when adding to playlists" is greyed out, you need to enable the Library Sync, let it error out, uncheck this, and start all over. Thanks for posting your solution, Osiyo.