State table tried to stop music title 'string', which is not playing
The state table tried to stop the music title, but that tune is not currently playing. Either the music player is not working properly or has terminated abnormally, or your state table has issued a Juke_box_stop_music when the tune did not start playing.
Check the error log for information about the music player program, and check that your state table correctly handles return codes from the Juke_Box custom server, only issuing juke_box_stop_music when a tune is playing.
White (error_id = 20501)
Log, System Monitor