[11:06:49 ERROR]: Could not pass event PlayerDeathEvent to KillerRewards v1.0.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:305) ~[spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:502) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:487) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callPlayerDeat
hEvent(CraftEventFactory.java:381) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]

        at net.minecraft.server.v1_8_R2.EntityPlayer.die(EntityPlayer.java:417)
[spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.EntityLiving.damageEntity(EntityLiving.j
ava:811) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.EntityHuman.damageEntity(EntityHuman.jav
a:800) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.EntityPlayer.damageEntity(EntityPlayer.j
ava:496) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.EntityHuman.attack(EntityHuman.java:1001
) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.EntityPlayer.attack(EntityPlayer.java:10
60) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java
:1343) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.PacketPlayInUseEntity.a(SourceFile:52) [
spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.PacketPlayInUseEntity.a(SourceFile:11) [
spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:1
3) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_31]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_31]
        at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot-1.8
.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:7
10) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:3
68) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:6
51) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java
:554) [spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: java.lang.NullPointerException
        at com.outlook.nathat890.KillerRewards.Rewards.onDeath(Rewards.java:45)
~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0
_31]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0
_31]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_31]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_31]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:301) ~[spigot-1.8.3.jar:git-Spigot-c136710-350cb99]
        ... 22 more