Can't add tracks to playlist

running funkwhale playlists tracks-add $playlistID $trackIDs.. (with the numerical IDs)

I'm only getting this: Error: 405, message='Method Not Allowed', url=URL('https://my.funk.host/api/v1/playlist/$playlistID/')

I also noticed that using the tracks command to list the entries in a playlist with the -i flag I only get Nones. Same for -c UUID and -c ID. The names and listing is otherwise fine... I also see an id field on the --raw JSON.

My funkwhale server is v1.0.