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java.lang.NullPointerException: 	at net.slipcor.pvparena.modules.betterclasses.BetterClasses.parseClassChange(BetterClasses.java:481)	at net.slipcor.pvparena.loadables.ArenaModuleManager.parseClassChange(ArenaModuleManager.java:221)	at net.slipcor.pvparena.arena.ArenaPlayer.setArenaClass(ArenaPlayer.java:755)	at net.slipcor.pvparena.goals.GoalInfect.commitPlayerDeath(GoalInfect.java:482)	at net.slipcor.pvparena.classes.PACheck.handlePlayerDeath(PACheck.java:591)	at net.slipcor.pvparena.listeners.PlayerListener.onPlayerDeath(PlayerListener.java:351)	at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor263.execute(Unknown Source)	at org.bukkit.plugin.EventExecutor$1.execute(EventExecutor.java:44)	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:74)	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:517)	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:502)	at org.bukkit.craftbukkit.v1_10_R1.event.CraftEventFactory.callPlayerDeathEvent(CraftEventFactory.java:409)	at net.minecraft.server.v1_10_R1.EntityPlayer.die(EntityPlayer.java:424)	at net.minecraft.server.v1_10_R1.EntityLiving.damageEntity(EntityLiving.java:931)	at net.minecraft.server.v1_10_R1.EntityHuman.damageEntity(EntityHuman.java:792)	at net.minecraft.server.v1_10_R1.EntityPlayer.damageEntity(EntityPlayer.java:515)	at net.minecraft.server.v1_10_R1.EntityHuman.attack(EntityHuman.java:1029)	at net.minecraft.server.v1_10_R1.EntityPlayer.attack(EntityPlayer.java:1178)	at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1616)	at net.minecraft.server.v1_10_R1.PacketPlayInUseEntity.a(PacketPlayInUseEntity.java:48)	at net.minecraft.server.v1_10_R1.PacketPlayInUseEntity.a(PacketPlayInUseEntity.java:5)	at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45)	at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:791)	at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:404)	at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:725)	at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:624)	at java.lang.Thread.run(Thread.java:745)