Board Thread:News and Announcements/@comment-24264457-20180925194341/@comment-26573805-20181125231626

I've gone on my alt account on the Wii U to verify this with Just Dance 2014's Rich Girl mashup, and yes, just to confirm:

The monthly mashups were indeed affected. You must now use save files from people who already have them unlocked from the past if you don't already have them unlocked yourself from before this shutdown.