[13:33:07] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'kits' in plugin KitEssentials v0.1
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-1387]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[spigot.jar:git-Spigot-1387]
	at org.bukkit.craftbukkit.v1_7_R2.CraftServer.dispatchCommand(CraftServer.java:719) ~[spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.PlayerConnection.handleCommand(PlayerConnection.java:984) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.PlayerConnection.a(PlayerConnection.java:829) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.NetworkManager.a(NetworkManager.java:148) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.ServerConnection.c(ServerConnection.java:77) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.MinecraftServer.v(MinecraftServer.java:705) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.DedicatedServer.v(DedicatedServer.java:273) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.MinecraftServer.u(MinecraftServer.java:568) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:474) [spigot.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618) [spigot.jar:git-Spigot-1387]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R3/Packet
	at me.MirrorRealm.Commands.KitCommand.sendUsage(KitCommand.java:155) ~[?:?]
	at me.MirrorRealm.Commands.KitCommand.onCommand(KitCommand.java:147) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-1387]
	... 13 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R3.Packet
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:67) ~[spigot.jar:git-Spigot-1387]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[spigot.jar:git-Spigot-1387]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]
	at me.MirrorRealm.Commands.KitCommand.sendUsage(KitCommand.java:155) ~[?:?]
	at me.MirrorRealm.Commands.KitCommand.onCommand(KitCommand.java:147) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-1387]
	... 13 more