... 23 more
[22:50:09 ERROR]: Could not pass event EntityDamageByEntityEvent to SiegesCore v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot.jar:git-Spigot-db6de12-930a59c]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-db6de12-930a59c]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-db6de12-930a59c]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-db6de12-930a59c]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callEvent(CraftEventFactory.java:87) [spigot.jar:git-Spigot-db6de12-930a59c]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:553) [spigot.jar:git-Spigot-db6de12-930a59c]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:466) [spigot.jar:git-Spigot-db6de12-930a59c]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleNonLivingEntityDamageEvent(CraftEventFactory.java:604) [spigot.jar:git-Spigot-db6de12-930a59c]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleNonLivingEntityDamageEvent(CraftEventFactory.java:590) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.EntityEnderCrystal.damageEntity(EntityEnderCrystal.java:63) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.EntityHuman.attack(EntityHuman.java:1001) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.EntityPlayer.attack(EntityPlayer.java:1063) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1355) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.PacketPlayInUseEntity.a(SourceFile:52) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.PacketPlayInUseEntity.a(SourceFile:11) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-db6de12-930a59c]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_73]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_73]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot.jar:git-Spigot-db6de12-930a59c]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot.jar:git-Spigot-db6de12-930a59c]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_73]
Caused by: java.lang.NullPointerException
        at sieges.c2w.listeners.EntityEvents.entityDamage(EntityEvents.java:28) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-db6de12-930a59c]
        ... 23 more