[19:59:03] [Server thread/ERROR]: Could not pass event EntityDamageByEntityEvent to PvPManager v2.4.4.2
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:509) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:494) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callEvent(CraftEventFactory.java:108) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:554) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:467) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:586) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.EntityLiving.d(EntityLiving.java:1040) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.EntityHuman.d(EntityHuman.java:824) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.EntityLiving.damageEntity(EntityLiving.java:684) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.EntityHuman.damageEntity(EntityHuman.java:765) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.EntityPlayer.damageEntity(EntityPlayer.java:465) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.EntityHuman.attack(EntityHuman.java:950) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:1204) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.PacketPlayInUseEntity.a(PacketPlayInUseEntity.java:37) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.PacketPlayInUseEntity.handle(PacketPlayInUseEntity.java:49) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
Caused by: java.lang.NoClassDefFoundError: com/massivecraft/factions/entity/UPlayer
	at me.NoChance.PvPManager.Utils.CombatUtils.canAttack(CombatUtils.java:90) ~[?:?]
	at me.NoChance.PvPManager.Utils.CombatUtils.tryCancel(CombatUtils.java:68) ~[?:?]
	at me.NoChance.PvPManager.Utils.CombatUtils.tryCancel(CombatUtils.java:98) ~[?:?]
	at me.NoChance.PvPManager.Listeners.PlayerListener.onPlayerDamage(PlayerListener.java:55) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor110.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_65]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_65]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:298) ~[spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	... 23 more