@Tim Curtis
Couldn't it be helpful to have (e.album_artist || e.artist || "missing tags") solve the issue for those "poorly tagged files"? As IMHO both tags are missing, resulting in undefined.toLowerCase() which of course does not exist...
Couldn't it be helpful to have (e.album_artist || e.artist || "missing tags") solve the issue for those "poorly tagged files"? As IMHO both tags are missing, resulting in undefined.toLowerCase() which of course does not exist...