Gets stuck after a song

[coffenbacher]

When I'm playing a playlist, usually it won't move on to the next song unless I manually do it. I use the version at http://soundcloudify.github.io

From the console:

TypeError: Cannot read property 'length' of undefined
    at scripts.455e5fdb.js:2
    at n.$eval (vendor.d371ea8b.js:5)
    at n.$apply (vendor.d371ea8b.js:5)
    at scripts.455e5fdb.js:2
    at n.$broadcast (vendor.d371ea8b.js:5)
    at d (scripts.455e5fdb.js:2)
    at L.g.I (www-widgetapi.js:64)
    at X.g.l (www-widgetapi.js:112)
    at X.g.J (www-widgetapi.js:129)
    at Jb.W.g (www-widgetapi.js:124)
(anonymous) @ vendor.d371ea8b.js:5