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java.lang.NullPointerException
	at org.l2jmobius.gameserver.model.actor.Attackable.calculateRewards(Attackable.java:394)
	at org.l2jmobius.gameserver.model.actor.Creature.doDie(Creature.java:1640)
	at org.l2jmobius.gameserver.model.actor.Npc.doDie(Npc.java:888)
	at org.l2jmobius.gameserver.model.actor.Attackable.doDie(Attackable.java:298)
	at org.l2jmobius.gameserver.model.actor.instance.MonsterInstance.doDie(MonsterInstance.java:132)
	at ai.bosses.Frintezza.LastImperialTomb.onAdvEvent(LastImperialTomb.java:613)
	at org.l2jmobius.gameserver.model.quest.Quest.notifyEvent(Quest.java:574)
	at org.l2jmobius.gameserver.model.quest.QuestTimer$ScheduleTimerTask.run(QuestTimer.java:47)
	at org.l2jmobius.commons.concurrent.RunnableWrapper.run(RunnableWrapper.java:38)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:835)