[SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'mob' in plugin MobRider v0.47.1-b103
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:168)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:492)
        at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:878)
        at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:825)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:807)
        at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:276)
        at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:109)
        at net.minecraft.server.ServerConnection.b(SourceFile:35)
        at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
        at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:581)
        at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212)
        at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.NullPointerException
        at com.edwardhand.mobrider.goals.FollowGoal.<init>(FollowGoal.java:14)
        at com.edwardhand.mobrider.goals.AttackGoal.<init>(AttackGoal.java:12)
        at com.edwardhand.mobrider.managers.GoalManager.setAttackGoal(GoalManager.java:108)
        at com.edwardhand.mobrider.managers.GoalManager.setAttackGoal(GoalManager.java:102)
        at com.edwardhand.mobrider.commands.AttackCommand.execute(AttackCommand.java:36)
        at com.edwardhand.mobrider.commands.CommandHandler.dispatch(CommandHandler.java:85)
        at com.edwardhand.mobrider.MobRider.onCommand(MobRider.java:102)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
        ... 15 more