Multiple sounds seem to have issues

[Qwertygiy]

Got a true error report now:

java.lang.NullPointerException
at a.a.b.a.a(Player.java:82)
at net.buildism.object.Sound$4.run(Sound.java:145)
at net.buildism.object.Sound.run(Sound.java:218)
at java.lang.Thread.run(Unknown source)