I tried the beta version, but it made no difference, except that the error is now different:
Code:
Sync started on 2022-09-05, 16:35:40 to foobar2000 on iPhone-8
tf/fb-m protcol version: 2
Library contains 20 tracks, 20 tracks requiring syncing
Device has 10.79 GB free space, 0 bytes already synchronized
Error: Error opening file '/Volumes/music/original/Alan Silvestri/Predator [2012]/03 Something Else; Cut 'Em Down; Payback Time.flac', check no other program has it open. Resource temporarily unavailable (errno:35) [Open] for source file: /Volumes/music/original/Alan Silvestri/Predator [2012]/03 Something Else; Cut 'Em Down; Payback Time.flac
Error: Error opening file '/Volumes/music/original/Alan Silvestri/Predator [2012]/04 The Truck.flac', check no other program has it open. Resource temporarily unavailable (errno:35) [Open] for source file: /Volumes/music/original/Alan Silvestri/Predator [2012]/04 The Truck.flac
Error: Error opening file '/Volumes/music/original/Alan Silvestri/Predator [2012]/02 Main Title.flac', check no other program has it open. Resource temporarily unavailable (errno:35) [Open] for source file: /Volumes/music/original/Alan Silvestri/Predator [2012]/02 Main Title.flac
Error: Error opening file '/Volumes/music/original/Alan Silvestri/Predator [2012]/01 Fox Logo [Alfred Newman; Elliot Goldenthal (arr.)].flac', check no other program has it open. Resource temporarily unavailable (errno:35) [Open] for source file: /Volumes/music/original/Alan Silvestri/Predator [2012]/01 Fox Logo [Alfred Newman; Elliot Goldenthal (arr.)].flac
...
Sync incomplete (see detailed log).