Partially broken on Kodi 20.5

[develroo]

For some reason, Browse stopped working after an upgrade to OSMC to Kodi 20. Both for Music and Podcasts. I can still open/play albums via Library, but that only shows albums, not podcasts? I cannot see any errors other than:

grep -i subsonic kodi.log 
2024-04-28 20:41:23.866 T:16615    info <general>: CAddonMgr::FindAddons: plugin.audio.subsonic v3.0.2 installed
2024-04-28 20:41:53.684 T:16668    info <general>: Subsonic service not started due to settings
2024-04-28 20:43:06.400 T:16887   error <general>: GetDirectory - Error getting plugin://plugin.audio.subsonic/?action=browse_folders&menu_id=folders
2024-04-28 20:43:06.408 T:16615   error <general>: CGUIMediaWindow::GetDirectory(plugin://plugin.audio.subsonic/?action=browse_folders&menu_id=folders) failed

For reference: The Server is Airconic-advanced 11.1.2-SNAPSHOT.20230420155505 – April 20, 2023

Any idea how to debug this?

Thanks.