We are using official APIs (developers access) as much as possible to handle all music services on Soundiiz and to get your music datas and also move your playlists and favorites to this platform.
Unfortunately, some methods like "delete" or "update" are not available with some music services APIs, which means we can no longer delete tracks in a playlist or a playlist, for example.
That's why you got an error 104, "Feature not available for this platform," if you are syncing with a "Replace" method or using any "Replace to" feature, for example. Or when trying to delete tracks in a playlist.
It could also be impossible to update a playlist (like updating the title, for example) as some music services do not provide such an "Update" method.
Finally, be aware that some features, like creating a playlist or adding items to favorites/library, are not allowed by music services for non-paid subscribers (like Amazon Music, for example) and will generate this 104 error on Soundiiz.
You can find more details about our compatibility with each music service here.