Can anyone help me please!!!!!
I got this error:
19:41:30 INFO]: KORRAILY issued server command: /npc create Katara --trait sent
ry
[19:41:30 WARN]: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R3/Pa
cket
[19:41:30 WARN]: at net.aufdemrand.sentry.SentryTrait.ensureInst(SentryTr
ait.java:134)
[19:41:30 WARN]: at net.aufdemrand.sentry.SentryTrait.onSpawn(SentryTrait
.java:116)
[19:41:30 WARN]: at net.citizensnpcs.api.npc.AbstractNPC.addTrait(Abstrac
tNPC.java:109)
[19:41:30 WARN]: at net.citizensnpcs.commands.NPCCommands.create(NPCComma
nds.java:377)
[19:41:30 WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native M
ethod)
[19:41:30 WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown S
ource)
[19:41:30 WARN]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unkno
wn Source)
[19:41:30 WARN]: at java.lang.reflect.Method.invoke(Unknown Source)
[19:41:30 WARN]: at net.citizensnpcs.api.command.CommandManager.executeMe
thod(CommandManager.java:154)
[19:41:30 WARN]: at net.citizensnpcs.api.command.CommandManager.execute(C
ommandManager.java:90)
[19:41:30 WARN]: at net.citizensnpcs.api.command.CommandManager.executeSa
fe(CommandManager.java:178)
[19:41:30 WARN]: at net.citizensnpcs.Citizens.onCommand(Citizens.java:236
)
[19:41:30 WARN]: at org.bukkit.command.PluginCommand.execute(PluginComman
d.java:44)
[19:41:30 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCo
mmandMap.java:141)
[19:41:30 WARN]: at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCo
mmand(CraftServer.java:645)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.PlayerConnection.handleC
ommand(PlayerConnection.java:1115)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.PlayerConnection.a(Playe
rConnection.java:950)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(Packe
tPlayInChat.java:26)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(Packe
tPlayInChat.java:53)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.PacketHandleTask.run(Sou
rceFile:13)
[19:41:30 WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(U
nknown Source)
[19:41:30 WARN]: at java.util.concurrent.FutureTask$Sync.innerRun(Unknown
Source)
[19:41:30 WARN]: at java.util.concurrent.FutureTask.run(Unknown Source)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.z(Minecr
aftServer.java:683)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.DedicatedServer.z(Dedica
tedServer.java:316)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.y(Minecr
aftServer.java:623)
[19:41:30 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.run(Mine
craftServer.java:526)
[19:41:30 WARN]: at java.lang.Thread.run(Unknown Source)
[19:41:30 WARN]: Caused by: java.lang.ClassNotFoundException: net.minecraft.serv
er.v1_7_R3.Packet
[19:41:30 WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(Pl
uginClassLoader.java:91)
[19:41:30 WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(Pl
uginClassLoader.java:86)
[19:41:30 WARN]: at java.lang.ClassLoader.loadClass(Unknown Source)
[19:41:30 WARN]: at java.lang.ClassLoader.loadClass(Unknown Source)
[19:41:30 WARN]: ... 28 more
[19:41:35 ERROR]: [Citizens] An exception occurred while the trait sentry was sp
awning for NPC ID 0.
[19:41:35 WARN]: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R3/Pa
cket
[19:41:35 WARN]: at net.aufdemrand.sentry.SentryTrait.ensureInst(SentryTr
ait.java:134)
[19:41:35 WARN]: at net.aufdemrand.sentry.SentryTrait.onSpawn(SentryTrait
.java:116)
[19:41:35 WARN]: at net.citizensnpcs.npc.CitizensNPC.spawn(CitizensNPC.ja
va:205)
[19:41:35 WARN]: at net.citizensnpcs.npc.entity.HumanController$SkinFetch
er$1.call(HumanController.java:212)
[19:41:35 WARN]: at net.citizensnpcs.npc.entity.HumanController$SkinFetch
er$1.call(HumanController.java:207)
[19:41:35 WARN]: at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftFuture.
run(CraftFuture.java:89)
[19:41:35 WARN]: at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftSchedul
er.mainThreadHeartbeat(CraftScheduler.java:350)
[19:41:35 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.z(Minecr
aftServer.java:694)
[19:41:35 WARN]: at net.minecraft.server.v1_8_R1.DedicatedServer.z(Dedica
tedServer.java:316)
[19:41:35 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.y(Minecr
aftServer.java:623)
[19:41:35 WARN]: at net.minecraft.server.v1_8_R1.MinecraftServer.run(Mine
craftServer.java:526)
[19:41:35 WARN]: at java.lang.Thread.run(Unknown Source)
[19:41:35 WARN]: Caused by: java.lang.ClassNotFoundException: net.minecraft.serv
er.v1_7_R3.Packet
[19:41:35 WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(Pl
uginClassLoader.java:91)
[19:41:35 WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(Pl
uginClassLoader.java:86)
[19:41:35 WARN]: at java.lang.ClassLoader.loadClass(Unknown Source)
[19:41:35 WARN]: at java.lang.ClassLoader.loadClass(Unknown Source)
[19:41:35 WARN]: ... 12 more