[13:00:30] [Server thread/ERROR]: Could not pass event PlayerLeashEntityEvent to MobStacker v1.8
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[sv.jar:git-Spigot-1649]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[sv.jar:git-Spigot-1649]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:514) [sv.jar:git-Spigot-1649]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:499) [sv.jar:git-Spigot-1649]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callPlayerLeashEntityEvent(CraftEventFactory.java:882) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.EntityInsentient.c(EntityInsentient.java:792) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.EntityHuman.q(EntityHuman.java:869) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:1190) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.PacketPlayInUseEntity.a(PacketPlayInUseEntity.java:37) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.PacketPlayInUseEntity.handle(PacketPlayInUseEntity.java:49) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [sv.jar:git-Spigot-1649]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [sv.jar:git-Spigot-1649]
Caused by: java.lang.NoSuchMethodError: org.bukkit.entity.Entity.setCustomName(Ljava/lang/String;)V
	at com.kiwifisher.mobstacker.utils.StackUtils.peelOff(StackUtils.java:218) ~[?:?]
	at com.kiwifisher.mobstacker.listeners.PlayerLeashEntityListener.playerLeashEvent(PlayerLeashEntityListener.java:20) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_65]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_65]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_65]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_65]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:298) ~[sv.jar:git-Spigot-1649]
	... 16 more