Alarm Clock can's set Apple Music

I used to be able assign a song from Apple Music to an alarm clock, but recently the button to choose a song in the Clock app disappeared, and the alarm clock that has been assigned a song plays Radiation (default) instead of the song. I’m still on 3-month trial of Apple Music, and can listen to music all right.

The three songs shown in the picture were imported with GarageBand, and funnily when I swipe to try to delete them, the Clock app crashes.