This app WAS great

This app has been amazing to download music from YouTube. Until about 5 minutes ago, it stopped allowing me to play my playlists? When I click the playlist button, the app shuts down. Ive powered off my phone and turned it back on but still for the past 24 hours it hasnt let me click my playlists? Please PLEASE fix this

Jftyyt about Free Tube Music - Mp3 Player and Playlist Manager, v1.1.0