Çözüldü skript entity hatası

[09:49:52] [Server thread/ERROR]: Could not pass event EntityDeathEvent to Skript v2.4-alpha4
java.lang.NoClassDefFoundError: org/bukkit/entity/TraderLlama
    at ch.njol.skript.entity.LlamaData.getType(LlamaData.java:85) ~[?:?]
    at ch.njol.skript.entity.EntityData.isInstance(EntityData.java:552) ~[?:?]
    at ch.njol.skript.classes.data.DefaultComparators$9.compare(DefaultComparators.java:219) ~[?:?]
    at ch.njol.skript.classes.data.DefaultComparators$9.compare(DefaultComparators.java:1) ~[?:?]
    at ch.njol.skript.conditions.CondCompare.lambda$1(CondCompare.java:257) ~[?:?]
    at ch.njol.skript.lang.util.SimpleExpression.check(SimpleExpression.java:173) ~[?:?]
    at ch.njol.skript.lang.util.SimpleLiteral.check(SimpleLiteral.java:173) ~[?:?]
    at ch.njol.skript.conditions.CondCompare.lambda$0(CondCompare.java:254) ~[?:?]
    at ch.njol.skript.lang.util.SimpleExpression.check(SimpleExpression.java:173) ~[?:?]
    at ch.njol.skript.lang.util.SimpleExpression.check(SimpleExpression.java:161) ~[?:?]
    at ch.njol.skript.conditions.CondCompare.check(CondCompare.java:253) ~[?:?]
    at ch.njol.skript.lang.Condition.run(Condition.java:56) ~[?:?]
    at ch.njol.skript.lang.Conditional.walk(Conditional.java:51) ~[?:?]
    at ch.njol.skript.lang.TriggerItem.walk(TriggerItem.java:89) ~[?:?]
    at ch.njol.skript.lang.Trigger.execute(Trigger.java:57) ~[?:?]
    at ch.njol.skript.SkriptEventHandler.check(SkriptEventHandler.java:156) ~[?:?]
    at ch.njol.skript.SkriptEventHandler$1.execute(SkriptEventHandler.java:114) ~[?:?]
    at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:527) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:512) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:396) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:389) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.EntityLiving.die(EntityLiving.java:1142) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.EntityLiving.damageEntity(EntityLiving.java:979) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.EntityHuman.attack(EntityHuman.java:1026) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.EntityPlayer.attack(EntityPlayer.java:1361) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1705) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.PacketPlayInUseEntity.a(PacketPlayInUseEntity.java:49) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.PacketPlayInUseEntity.a(PacketPlayInUseEntity.java:6) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_191]
    at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_191]
    at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:843) [patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:427) [patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:767) [patched.jar:git-TacoSpigot-"f8ba67d6"]
    at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:665) [patched.jar:git-TacoSpigot-"f8ba67d6"]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_191]
Caused by: java.lang.ClassNotFoundException: org.bukkit.entity.TraderLlama
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:109) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:104) ~[patched.jar:git-TacoSpigot-"f8ba67d6"]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_191]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_191]
    ... 39 more