This got to the point where one library was failing to update on Seadrive on laptop. The log was full of these errors. Logging off and back on, all appears well now.
[03/19/23 13:04:31] All events are processed for repo 5ee936b0-0e68-4c56-8d22-12e8b1c0da9a.
[03/19/23 13:04:31] Transfer repo ‘8941cdac’: (‘normal’, ‘update-branch’) → (‘error’, ‘finished’)
[03/19/23 13:04:31] Repo ‘My Library’ sync state transition from uploading to ‘error’: ‘Error occured in upload.’.
[03/19/23 13:04:31] Repo ‘Commands’ sync state transition from ‘committing’ to ‘synchronized’.
[03/19/23 13:04:32] Repo ‘Projects’ sync state transition from ‘synchronized’ to ‘committing’.
[03/19/23 13:04:32] All events are processed for repo 0cc0aeae-1304-45b1-aacd-65b5897c3f31.
[03/19/23 13:04:32] Repo ‘Projects’ sync state transition from ‘committing’ to ‘synchronized’.
[03/19/23 13:05:02] Repo ‘My Library’ sync state transition from ‘synchronized’ to ‘uploading’.
[03/19/23 13:05:02] Upload with HTTP sync protocol version 2.
[03/19/23 13:05:02] Transfer repo ‘8941cdac’: (‘normal’, ‘init’) → (‘normal’, ‘check’)
[03/19/23 13:05:03] Transfer repo ‘8941cdac’: (‘normal’, ‘check’) → (‘normal’, ‘commit’)
[03/19/23 13:05:03] Transfer repo ‘8941cdac’: (‘normal’, ‘commit’) → (‘normal’, ‘fs’)
[03/19/23 13:05:03] Transfer repo ‘8941cdac’: (‘normal’, ‘fs’) → (‘normal’, ‘data’)
[03/19/23 13:05:03] Transfer repo ‘8941cdac’: (‘normal’, ‘data’) → (‘normal’, ‘update-branch’)
[03/19/23 13:05:03] Bad response code for PUT https://seafile.maltsystems.co.uk/seafhttp/repo/8941cdac-88f8-4a11-9411-8392b7f7b5cc/commit/HEAD/?head=c3defb0bd5323afd42b023703e96dd5fe559e35e: 500.
[03/19/23 13:05:03] Failed to update branch of repo 8941cdac.