Just to let you know, Please note that for Spotify to have music on their servers; they require the permissions from the record label. The chances are that the record label have removed the permissions from Spotify, which means that Spotify can't have the music. Spotify make everything they have available to us, so hopefully it will appear soon! It could be to fix metadata at which point they'll return again soon.
You can also check out the Music FAQ which has some more information.
This post was by Taylor - I do not work for Spotify! If this solved your issue - Mark it as a solution!If you like my post - Please add Kudos! || Spotify Profile - Taylor | Feel free to PM me - Here ||