Bukkit

What steps will reproduce the problem?
1. Using any command that gives a tier in a profession gives an internal server error and kicks the player that used it.
2.
3.

What is the expected output? What do you see instead?  Instead of granting a tier in the profession it produces an error in the console and kicks the player.

What version of the product are you using? Latest update.

Do you have an error log of what happened?

Failed to handle packet for /109.147.17.250:50472
java.lang.NullPointerException
    at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:101) ~[minecraft_server.jar:git-Spigot-1646]
    at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:425) ~[minecraft_server.jar:git-Spigot-1646]
    at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:406) ~[minecraft_server.jar:git-Spigot-1646]
    at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:367) [minecraft_server.jar:git-Spigot-1646]
    at org.apache.logging.log4j.core.Logger.log(Logger.java:110) [minecraft_server.jar:git-Spigot-1646]
    at org.apache.logging.log4j.spi.AbstractLogger.error(AbstractLogger.java:609) [minecraft_server.jar:git-Spigot-1646]
    at org.bukkit.craftbukkit.v1_7_R4.util.ForwardLogHandler.publish(ForwardLogHandler.java:33) ~[minecraft_server.jar:git-Spigot-1646]
    at java.util.logging.Logger.log(Logger.java:616) ~[?:1.7.0_55]
    at java.util.logging.Logger.doLog(Logger.java:641) ~[?:1.7.0_55]
    at java.util.logging.Logger.log(Logger.java:730) ~[?:1.7.0_55]
    at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerConnection.java:1049) ~[minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:880) ~[minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28) ~[minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat.java:65) ~[minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186) ~[minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734) [minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [minecraft_server.jar:git-Spigot-1646]
    at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [minecraft_server.jar:git-Spigot-1646]
[01:40:29] [Server thread/INFO]: _Coconut2 lost connection: Internal server error

Please provide any additional information below.

Hey long time no see thought I'd give your plugin a try it looks like just what im after but I keep getting this error. Any idea why?

Cheers

Carl