Playback halts around 20mins. Drops back to menu

[musictalks 2]

Emby server running on remote Macmini M4. Playback of movies on Appletv. All ethernet connected. Playback stops and returns to main menu after 20 mins or so. I can continue playback but fails again. Error from log (attached) seems to be "Error SyncService-0HNLLA20RNRN7:00000003: Access token is invalid or expired." This has been happening since January 2026. I'm now using latest Beta on server 4.10.0.11 out of frustration but error remains. TVOS (latest May 1 2026)

Any help would be appreciated. 

 

embyserver.txt