Cubics error

(ENGLISH)
Very nice datapack! has a bug IT the when you use the any cubic:
http://prntscr.com/m7ouf5

the If you the know what the below code is.

(Ru)

Very good data packet! There is no error when using any cube:
http://prntscr.com/m7ouf5

I do not know, please tell me.

Код:

[12:29:03] ERROR Exception: RunnableImpl.run (): java.lang.UnsupportedOperationEx
ception
java.lang.UnsupportedOperationException
       at java.util.concurrent.CopyOnWriteArrayList $ COWIterator.set (Unknown Sou
rce)
       at java.util.Collections.sort (Unknown Source)
       at l2s.commons.math.random.RndSelector.chance (RndSelector.java:64)
       at l2s.commons.math.random.RndSelector.chance (RndSelector.java:79)
       at l2s.gameserver.templates.CubicTemplate.getRandomSkill (CubicTemplate.j
ava: 112)
       at l2s.gameserver.model.actor.instances.player.Cubic.runImpl (Cubic.java:
87)
       at l2s.commons.threading.RunnableImpl.run (RunnableImpl.java:21)
       at java.util.concurrent.Executors $ RunnableAdapter.call (Unknown Source)
       at java.util.concurrent.FutureTask.runAndReset (Unknown Source)
       at java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.
access $ 301 (Unknown Source)
       at java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.
run (Unknown Source)
       at java.util.concurrent.ThreadPoolExecutor.runWorker (Unknown Source)
       at java.util.concurrent.ThreadPoolExecutor $ Worker.run (Unknown Source)
       at java.lang.Thread.run (Unknown Source)
       at l2s.commons.threading.PriorityThreadFactory $ 1.run (PriorityThreadFacto
ry.java:35)

 

it's java problem, FIXED so CLOSE PLEASE