I'm having the red circles with red lines through it appear next to many tracks

I bought these tracks from Beatport primarily. At first I couldn't even move them to a playlist from iTunes so I downloaded the latest version of Rekordbox 5.8.7 and restarted it and now I'm able to put them into rekordbox but I'm seeing the red circles with red lines through them and I'm unable to play them in the Recordbox mixer.