Rekordbox software problem

I am having trouble using my iTunes music. The software "Rekordbox" is not letting import my iTunes playlist music into the decks or the Collection section. When I click on the iTunes section it gives me option such as " All tracks and Playlist". When I go to playlist, then click on my song it shows a cancel symbol next to the track number. When I right click on the song to import it to deck 1. it says " One or more files were not imported. check the log file saved in the "Documents" folder. Import log- 2019-02-08.txt". What does that mean?