error handling client message [C] 04 Action
java.lang.NullPointerException
        at net.sf.l2j.gameserver.SevenSigns.getSealOwner(SevenSigns.java:513)
        at net.sf.l2j.gameserver.model.actor.instance.L2NpcInstance.showChatWind
ow(L2NpcInstance.java:1645)
        at net.sf.l2j.gameserver.model.actor.instance.L2NpcInstance.onAction(L2N
pcInstance.java:540)
        at net.sf.l2j.gameserver.clientpackets.Action.runImpl(Action.java:93)
        at net.sf.l2j.gameserver.clientpackets.ClientBasePacket.run(ClientBasePa
cket.java:57)
        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)

Exception in thread "General Pool-1" java.lang.NullPointerException
        at net.sf.l2j.gameserver.SevenSigns.getSealOwner(SevenSigns.java:513)
        at net.sf.l2j.gameserver.model.actor.instance.L2NpcInstance.showChatWind
ow(L2NpcInstance.java:1645)
        at net.sf.l2j.gameserver.model.actor.instance.L2NpcInstance.onAction(L2N
pcInstance.java:540)
        at net.sf.l2j.gameserver.model.actor.instance.L2PcInstance.doInteract(L2
PcInstance.java:2948)
        at net.sf.l2j.gameserver.model.actor.instance.L2PcInstance$AIAccessor.do
Interact(L2PcInstance.java:233)
        at net.sf.l2j.gameserver.ai.L2PlayerAI.thinkInteract(L2PlayerAI.java:249
)
        at net.sf.l2j.gameserver.ai.L2PlayerAI.onEvtThink(L2PlayerAI.java:269)
        at net.sf.l2j.gameserver.ai.L2CharacterAI.onEvtArrived(L2CharacterAI.jav
a:653)
        at net.sf.l2j.gameserver.ai.AbstractAI.notifyEvent(AbstractAI.java:398)
        at net.sf.l2j.gameserver.ai.AbstractAI.notifyEvent(AbstractAI.java:327)
        at net.sf.l2j.gameserver.GameTimeController$MovingObjectArrived.run(Game
TimeController.java:241)
        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)