FIXED the not loading, not syncing issue by logging out from the app, disabling the sync button..reinitiating music app by removing the file library in directory Media, searching in finder for caches of .music .iTunes to remove them. restarting music while holding option-button selecting new library. so you have an untouched app. then I fully logged out from appleID disconnecting all iCloud related settings(removed the Mac from appleID). When I signed in it worked like normal...I hope it works for everyone else