Creating a music player applcation and get an 701 error when testing in emulator

[Drthunder01]

hi there so as stated im making a mp3 player app where im able to pause/play the mp3 as well as being able to change song which will also change the cover art and music name itself when i ran it in the emulator i got an error 701 and it was unable to play i have included the aia file here
LO3_mobile_app_mp3_player.aia (6.6 MB)
as well as a screenshot of the blocks

any help would be great thank you !!

[TIMAI2]

Source is expecting a path (ensure you provide a valid filepath) to a single music file (mp3 etc.), NOT a list.

[ABG]

This block makes more sense than a global variable.