SEVERE: error handling client message [C] 14 UseItem
java.lang.NullPointerException
        at net.sf.l2j.gameserver.model.L2World.getVisibleObjects(L2World.java:221)
        at net.sf.l2j.gameserver.ai.L2AttackableAI.onEvtThink(L2AttackableAI.java:125)
        at net.sf.l2j.gameserver.ai.L2CharacterAI.onIntentionActive(L2CharacterAI.java:73)
        at net.sf.l2j.gameserver.ai.AbstractAI.setIntention(AbstractAI.java:120)
        at net.sf.l2j.gameserver.ai.AbstractAI.setIntention(AbstractAI.java:108)
        at net.sf.l2j.gameserver.model.L2MonsterInstance.addKnownObject(L2MonsterInstance.java:57)
        at net.sf.l2j.gameserver.model.L2Character.setTarget(L2Character.java:1252)
        at net.sf.l2j.gameserver.model.L2PcInstance.setTarget(L2PcInstance.java:1243)
        at net.sf.l2j.gameserver.handler.itemhandlers.BlessedSpiritShot.useItem(BlessedSpiritShot.java:109)
        at net.sf.l2j.gameserver.clientpackets.UseItem.runImpl(UseItem.java:119)
        at net.sf.l2j.gameserver.clientpackets.ClientBasePacket.run(ClientBasePacket.java:56)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(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$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)