Some File Can't Share on Retro Music Player, It says "Not apps can perform this action"

https://github.com/h4h13/RetroMusicPlayer

Expected behavior

I hope when sharing music file there is no problem at all, i mean, all song can to shared without problem.

Actual behavior

When I try to share music, this app does not work. Some music file can not be shared. There are some files that can be shared and some file that can not be shared, Most non-shareable files are from sd card.

How to reproduce

• Download app: Here
• Launch app
• Select the music you want to share
• Click on options beside under music item and select share music file
• It will say Not apps can perform this action
• Browser: Retro Music Player vR5.1.85_20180502
• Operating system: Android 5.1

Recording of the bug

My GitHub account