Error creating new instance of Class class net.sf.l2j.gameserver.skills.EffectBuff
java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedConstructorAccessor27.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at net.sf.l2j.gameserver.skills.EffectTemplate.getEffect(EffectTemplate.java:80)
        at net.sf.l2j.gameserver.model.L2Skill.getEffects(L2Skill.java:1320)
        at net.sf.l2j.gameserver.handler.skillhandlers.Continuous.useSkill(Continuous.java:93)
        at net.sf.l2j.gameserver.model.L2Character.callSkill(L2Character.java:4886)
        at net.sf.l2j.gameserver.clientpackets.EnterWorld.updateEffects(EnterWorld.java:185)
        at net.sf.l2j.gameserver.clientpackets.EnterWorld.runImpl(EnterWorld.java:92)
        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)
Caused by: java.lang.NullPointerException
        at net.sf.l2j.gameserver.model.L2Character.effectQueueInsert(L2Character.java:5113)
        at net.sf.l2j.gameserver.model.L2Character.addEffect(L2Character.java:5073)
        at net.sf.l2j.gameserver.model.L2Effect.startEffectTask(L2Effect.java:252)
        at net.sf.l2j.gameserver.model.L2Effect.scheduleEffect(L2Effect.java:366)
        at net.sf.l2j.gameserver.model.L2Effect.<init>(L2Effect.java:167)
        at net.sf.l2j.gameserver.skills.EffectBuff.<init>(EffectBuff.java:33)
        ... 18 more