some how dj can't find my music library. playlists show up but tunes won't load.

somehow my itunes library is screwed up in DJ. It can’t find tracks, but the playlists do show up. Some how something got moved around. There is a folder on my mac that shows everything but it’s in icloud on my desktop. Was never there before. investigating further it appears to be songs that were purchased from itunes but not all of them. Get message that says could not find track. File or directory. But they do play in itunes app.