There is a discussion here about the media location https://community.home-assistant.io/t/media-folder-location/231755/12
I have set this up and can select one of my own sounds in a media player, but it does not play.
I think this error appears:
homeassistant.components.sonos.exception.SonosUpdateError: Error calling SonosMediaPlayerEntity._play_media on media_player.decking: HTTPConnectionPool(host=‘192.168.86.33’, port=1400): Read timed out. (read timeout=9.5)
Is this an issue with docker port forwarding that I need to address?