[21:53:41 ERROR]: Could not pass event EntityDamageByEntityEvent to Trade v1.0 BETA ver3
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:509) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:494) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callEvent(CraftEventFactory.java:108) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:554) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:467) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:586) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.EntityLiving.d(EntityLiving.java:1040) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.EntityHuman.d(EntityHuman.java:824) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.EntityLiving.damageEntity(EntityLiving.java:684) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.EntityHuman.damageEntity(EntityHuman.java:765) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.EntityPlayer.damageEntity(EntityPlayer.java:465) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.EntityHuman.attack(EntityHuman.java:950) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.citizensnpcs.npc.ai.MCTargetStrategy$1.handle(MCTargetStrategy.java:239) [citizens-2.0.13-SNAPSHOT.jar:?]
        at net.citizensnpcs.npc.ai.MCTargetStrategy.update(MCTargetStrategy.java:129) [citizens-2.0.13-SNAPSHOT.jar:?]
        at net.citizensnpcs.npc.ai.CitizensNavigator.run(CitizensNavigator.java:133) [citizens-2.0.13-SNAPSHOT.jar:?]
        at net.citizensnpcs.npc.CitizensNPC.update(CitizensNPC.java:229) [citizens-2.0.13-SNAPSHOT.jar:?]
        at net.citizensnpcs.npc.entity.EntityHumanNPC.h(EntityHumanNPC.java:193) [citizens-2.0.13-SNAPSHOT.jar:?]
        at net.minecraft.server.v1_7_R4.World.entityJoinedWorld(World.java:1620) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.World.playerJoinedWorld(World.java:1595) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.World.tickEntities(World.java:1460) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.WorldServer.tickEntities(WorldServer.java:516) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:706) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
Caused by: java.lang.NullPointerException
        at me.josvth.bukkitformatlibrary.message.FormattedMessage.send(FormattedMessage.java:50) ~[?:?]
        at me.josvth.trade.request.RequestManager.submit(RequestManager.java:299) ~[?:?]
        at me.josvth.trade.request.RequestListener.handleEvent(RequestListener.java:61) ~[?:?]
        at me.josvth.trade.request.RequestListener.onLeftClick(RequestListener.java:55) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor330.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_67]
        at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_67]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:298) ~[spigot.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
        ... 27 more