Null pointer exception inventory click event?

Hi, I'm getting a null pointer error in my plugin and I have no idea what is wrong.
Code:

Code:

package com.shockmc.kitpvp.listeners;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.GameMode;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.PlayerInventory;

import com.connorlinfoot.titleapi.TitleAPI;
import com.shockmc.kitpvp.Kitpvp;
import com.shockmc.kitpvp.MessageManager;

public class InventoryInteract implements Listener {
   
    private Kitpvp main;
   
    @EventHandler
    public void onPlayerInteract(InventoryClickEvent e) {
        if (e.getInventory().getName().equalsIgnoreCase("Free kits")) {
            if (!(e.getWhoClicked() instanceof Player)) {
                return;
            }
            if (e.getCurrentItem() == null) {
                return;
            }
            if (e.getCurrentItem().getItemMeta() == null) {
                return;
            }
            Player p = (Player) e.getWhoClicked();
            e.setCancelled(true);
            if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Archer")) {
                p.getInventory().clear();
                this.giveArcherKit(p);
                TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Archer",ChatColor.RED + "Archer kit selected");
                p.closeInventory();
            }
            if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Pyro")) {
                p.getInventory().clear();
                this.givePyroKit(p);
                TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Pyro",ChatColor.RED + "Pyro kit selected");
                p.closeInventory();
            }
            if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Snitch")) {
                p.getInventory().clear();
                this.giveSnitchKit(p);
                TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Snitch",ChatColor.RED + "Snitch kit selected");
                p.closeInventory();
            }
            if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Snowman")) {
                p.getInventory().clear();
                this.giveSnowmanKit(p);
                TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Snowman",ChatColor.RED + "Snowman kit selected");
                p.closeInventory();
            }
            if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Swordsman")) {
                p.getInventory().clear();
                this.giveSwordsmanKit(p);
                TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Swordsman",ChatColor.RED + "Swordsman kit selected");
                p.closeInventory();
            }
        }else{
            if (e.getInventory().getName().equalsIgnoreCase("Spectate")) {
                if (!(e.getWhoClicked() instanceof Player)) {
                    return;
                }
                if (e.getCurrentItem() == null) {
                    return;
                }
                if (e.getCurrentItem().getItemMeta() == null) {
                    return;
                }
                Player p = (Player) e.getWhoClicked();
                e.setCancelled(true);
                Player target = Bukkit.getPlayer(e.getCurrentItem().getItemMeta().getDisplayName());
                if (target == null) {
                    MessageManager.sendBad(p, "Internal error: Unable to find player, error report sent.");
                    Bukkit.getLogger().severe("Internal error: Could not find player in 'SpectateGUI'");
                    return;
                }
                p.teleport(target);
                p.setGameMode(GameMode.SPECTATOR);
            }else{
                if (e.getInventory().getName().equalsIgnoreCase("Arenas")) {
                    if (!(e.getWhoClicked() instanceof Player)) {
                        return;
                    }
                    if (e.getCurrentItem() == null) {
                        return;
                    }
                    if (e.getCurrentItem().getItemMeta() == null) {
                        return;
                    }
                    Player p = (Player) e.getWhoClicked();
                    e.setCancelled(true);
                    if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Coal")) {
                        if (main.getConfig().getConfigurationSection("coal") == null) {
                            MessageManager.sendBad(p, "Coal arena not set yet.");
                            return;
                        }
                        World w = Bukkit.getServer().getWorld(main.getConfig().getString("coal.world"));
                        double x = main.getConfig().getDouble("coal.x");
                        double y = main.getConfig().getDouble("coal.y");
                        double z = main.getConfig().getDouble("coal.z");
                        p.teleport(new Location(w, x, y, z));
                        TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Coal arena",ChatColor.RED + "Now in coal arena.");
                        p.closeInventory();
                    }
                    if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Iron")) {
                        if (main.getConfig().getConfigurationSection("iron") == null) {
                            MessageManager.sendBad(p, "Iron arena not set yet.");
                            return;
                        }
                        World w = Bukkit.getServer().getWorld(main.getConfig().getString("iron.world"));
                        double x = main.getConfig().getDouble("iron.x");
                        double y = main.getConfig().getDouble("iron.y");
                        double z = main.getConfig().getDouble("iron.z");
                        p.teleport(new Location(w, x, y, z));
                        TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Iron arena",ChatColor.RED + "Now in iron arena.");
                        p.closeInventory();
                    }
                    if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Diamond")) {
                        if (main.getConfig().getConfigurationSection("diamond") == null) {
                            MessageManager.sendBad(p, "Diamond arena not set yet.");
                            return;
                        }
                        World w = Bukkit.getServer().getWorld(main.getConfig().getString("diamond.world"));
                        double x = main.getConfig().getDouble("diamond.x");
                        double y = main.getConfig().getDouble("diamond.y");
                        double z = main.getConfig().getDouble("diamond.z");
                        p.teleport(new Location(w, x, y, z));
                        TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Diamond arena",ChatColor.RED + "Now in diamond arena.");
                        p.closeInventory();
                    }
                    if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Emerald")) {
                        if (main.getConfig().getConfigurationSection("emerald") == null) {
                            MessageManager.sendBad(p, "Emerald arena not set yet.");
                            return;
                        }
                        World w = Bukkit.getServer().getWorld(main.getConfig().getString("emerald.world"));
                        double x = main.getConfig().getDouble("emerald.x");
                        double y = main.getConfig().getDouble("emerald.y");
                        double z = main.getConfig().getDouble("emerald.z");
                        p.teleport(new Location(w, x, y, z));
                        TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Emerald arena",ChatColor.RED + "Now in emerald arena.");
                        p.closeInventory();
                    }
                    if (e.getCurrentItem().getItemMeta().getDisplayName().contains("Pro")) {
                        if (main.getConfig().getConfigurationSection("pro") == null) {
                            MessageManager.sendBad(p, "Pro arena not set yet.");
                            return;
                        }
                        World w = Bukkit.getServer().getWorld(main.getConfig().getString("pro.world"));
                        double x = main.getConfig().getDouble("pro.x");
                        double y = main.getConfig().getDouble("pro.y");
                        double z = main.getConfig().getDouble("pro.z");
                        p.teleport(new Location(w, x, y, z));
                        TitleAPI.sendTitle(p,10,50,10,ChatColor.GREEN + "Pro arena",ChatColor.RED + "Now in pro arena.");
                        p.closeInventory();
                    }
                }
            }
        }
       
    }
   
    public void giveArcherKit(Player p) {
        PlayerInventory pi = p.getInventory();
        pi.setBoots(new ItemStack(Material.LEATHER_BOOTS));
        pi.setLeggings(new ItemStack(Material.LEATHER_LEGGINGS));
        pi.setChestplate(new ItemStack(Material.LEATHER_CHESTPLATE));
        pi.setHelmet(new ItemStack(Material.LEATHER_HELMET));
        pi.addItem(new ItemStack(Material.BOW));
        pi.addItem(new ItemStack(Material.ARROW, 64));
        for (int i = 0; i < p.getInventory().getSize(); i++) {
            if (p.getInventory().getItem(i) == null) {
                p.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            }
        }
    }
   
    public void givePyroKit(Player p) {
        PlayerInventory pi = p.getInventory();
        pi.setBoots(new ItemStack(Material.LEATHER_BOOTS));
        pi.setLeggings(new ItemStack(Material.LEATHER_LEGGINGS));
        pi.setChestplate(new ItemStack(Material.LEATHER_CHESTPLATE));
        pi.setHelmet(new ItemStack(Material.LEATHER_HELMET));
        pi.addItem(new ItemStack(Material.WOOD_SWORD));
        pi.addItem(new ItemStack(Material.FLINT_AND_STEEL));
        pi.addItem(new ItemStack(Material.FIREBALL));
        for (int i = 0; i < p.getInventory().getSize(); i++) {
            if (p.getInventory().getItem(i) == null) {
                p.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            }
        }
    }
   
    public void giveSnitchKit(Player p) {
        PlayerInventory pi = p.getInventory();
        pi.setBoots(new ItemStack(Material.GOLD_BOOTS));
        pi.setLeggings(new ItemStack(Material.GOLD_LEGGINGS));
        pi.setChestplate(new ItemStack(Material.GOLD_CHESTPLATE));
        pi.setHelmet(new ItemStack(Material.GOLD_HELMET));
        pi.addItem(new ItemStack(Material.GOLD_SWORD));
        pi.addItem(new ItemStack(Material.TNT, 5));
        for (int i = 0; i < p.getInventory().getSize(); i++) {
            if (p.getInventory().getItem(i) == null) {
                p.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            }
        }
    }
   
    public void giveSnowmanKit(Player p) {
        PlayerInventory pi = p.getInventory();
        pi.setBoots(new ItemStack(Material.CHAINMAIL_BOOTS));
        pi.setLeggings(new ItemStack(Material.CHAINMAIL_LEGGINGS));
        pi.setChestplate(new ItemStack(Material.CHAINMAIL_CHESTPLATE));
        pi.setHelmet(new ItemStack(Material.CHAINMAIL_HELMET));
        pi.addItem(new ItemStack(Material.WOOD_SWORD));
        pi.addItem(new ItemStack(Material.SNOW_BALL, 10));
        pi.addItem(new ItemStack(Material.FISHING_ROD, 1));
        for (int i = 0; i < p.getInventory().getSize(); i++) {
            if (p.getInventory().getItem(i) == null) {
                p.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            }
        }
    }
   
    public void giveSwordsmanKit(Player p) {
        PlayerInventory pi = p.getInventory();
        pi.setBoots(new ItemStack(Material.DIAMOND_BOOTS));
        pi.setLeggings(new ItemStack(Material.DIAMOND_LEGGINGS));
        pi.setChestplate(new ItemStack(Material.DIAMOND_CHESTPLATE));
        pi.setHelmet(new ItemStack(Material.DIAMOND_HELMET));
        pi.addItem(new ItemStack(Material.IRON_SWORD));
        pi.addItem(new ItemStack(Material.GOLDEN_APPLE, 2));
        for (int i = 0; i < p.getInventory().getSize(); i++) {
            if (p.getInventory().getItem(i) == null) {
                p.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            }
        }
    }
}

Arena GUI class:

Code:

package com.shockmc.kitpvp.gui;

import java.util.Arrays;
import java.util.List;

import net.md_5.bungee.api.ChatColor;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.Plugin;

public class ArenaGUI implements Listener {
   
    private static Inventory inv;
   
    private ItemStack arena1,arena2,arena3,arena4,arena5;
   
    public ArenaGUI(Plugin p) {
        inv = Bukkit.getServer().createInventory(null, 36, "Arenas");
       
        arena1 = this.addItem(new ItemStack(Material.COAL), ChatColor.GOLD + "Coal", Arrays.asList(ChatColor.YELLOW + "Click me to join"));
        arena2 = this.addItem(new ItemStack(Material.IRON_INGOT), ChatColor.GOLD + "Iron", Arrays.asList(ChatColor.YELLOW + "Click me to join"));
        arena3 = this.addItem(new ItemStack(Material.DIAMOND), ChatColor.GOLD + "Diamond", Arrays.asList(ChatColor.YELLOW + "Click me to join"));
        arena4 = this.addItem(new ItemStack(Material.EMERALD), ChatColor.GOLD + "Emerald", Arrays.asList(ChatColor.YELLOW + "Click me to join"));
        arena5 = this.addItem(new ItemStack(Material.BEDROCK), ChatColor.GOLD + "Pro", Arrays.asList(ChatColor.YELLOW + "Click me to join"));
       
        //[][1][][1][][1][][1][]
        //[][1][][1][][1][][1][]
       
        inv.setItem(10, arena1);
        inv.setItem(12, arena2);
        inv.setItem(14, arena3);
        inv.setItem(16, arena4);
        inv.setItem(22, arena5);
       
        ItemStack filler = new ItemStack(Material.STAINED_GLASS_PANE,1,(short)11);
        ItemMeta fmeta = filler.getItemMeta();
        fmeta.setDisplayName("");
        filler.setItemMeta(fmeta);
        for (int i = 0; i < inv.getSize(); i++) {
            if (inv.getItem(i) == null) {
                inv.setItem(i, filler);
            }
        }
       
        Bukkit.getServer().getPluginManager().registerEvents(this, p);
    }
   
    public ItemStack addItem(ItemStack item, String name, List<String> lore) {
        ItemStack i = item;
        ItemMeta im = i.getItemMeta();
        im.setDisplayName(name);
        im.setLore(lore);
        i.setItemMeta(im);
        return i;
    }
   
    public static void openArenaGUI(Player p) {
        p.openInventory(inv);
    }

}

Main class:

Code:

package com.shockmc.kitpvp;

import net.md_5.bungee.api.ChatColor;

import org.bukkit.Bukkit;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

import com.shockmc.kitpvp.currency.MySQL;
import com.shockmc.kitpvp.gui.ArenaGUI;
import com.shockmc.kitpvp.gui.FreeKitGUI;
import com.shockmc.kitpvp.listeners.DeathEvent;
import com.shockmc.kitpvp.listeners.InteractEvent;
import com.shockmc.kitpvp.listeners.InventoryInteract;
import com.shockmc.kitpvp.listeners.PlayerJoin;
import com.shockmc.kitpvp.listeners.RespawnEvent;
import com.shockmc.kitpvp.listeners.SaturationEvent;

public class Kitpvp extends JavaPlugin implements Listener {
   
    private static MySQL mysql;
    private FreeKitGUI freekits;
    private ArenaGUI arenas;
   
    public void onEnable() {
        setMysql(new MySQL("localhost", "root", "", "razedhub"));
       
        getConfig().options().copyDefaults(true);
        saveConfig();
       
        freekits = new FreeKitGUI(this);
        arenas = new ArenaGUI(this);
       
        Bukkit.getServer().getPluginManager().registerEvents(new DeathEvent(), this);
        Bukkit.getServer().getPluginManager().registerEvents(new InventoryInteract(), this);
        Bukkit.getServer().getPluginManager().registerEvents(new InteractEvent(), this);
        Bukkit.getServer().getPluginManager().registerEvents(new PlayerJoin(), this);
        Bukkit.getServer().getPluginManager().registerEvents(new RespawnEvent(), this);
        Bukkit.getServer().getPluginManager().registerEvents(new SaturationEvent(), this);
    }
   
    public static MySQL getMysql() {
        return mysql;
    }
   
    public FreeKitGUI getFreeKitGUI() {
        return freekits;
    }
   
    public ArenaGUI getArenaGUI() {
        return arenas;
    }

    public void setMysql(MySQL mysql) {
        Kitpvp.mysql = mysql;
    }
   
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        if (cmd.getName().equalsIgnoreCase("freekits")) {
            if (!(sender instanceof Player)) {
                sender.sendMessage(ChatColor.RED + "You can't do this command.");
                return true;
            }
            Player p = (Player) sender;
            FreeKitGUI.openFreeKitGUI(p);
            MessageManager.sendGood(p, "Opening free kits");
        }
        if (cmd.getName().equalsIgnoreCase("addtokens")) {
            if (!(sender instanceof Player)) {
                Player sender1 = (Player) sender;
                MessageManager.sendTokens(sender1, "You can't run commands as the console");
                return true;
            }
            Player p = (Player) sender;
            if (!p.hasPermission("shockmc.tokens.add")) {
                MessageManager.sendTokens(p, "You can buy tokens from the store! Go to http://buycraft.com/ourwebsite");
                return true;
            }
            if (args.length == 0) {
                MessageManager.sendTokens(p, "Please specify a player. /addtokens <player> <amount>");
                return true;
            }
            Player player = Bukkit.getServer().getPlayer(args[0]);
            if (player == null) {
                MessageManager.sendTokens(p, "That player is not online, you can do this in the database or on the admin panel.");
                return true;
            }
            try{
                Integer.parseInt(args[1]);
            }
            catch(Exception ex){
                MessageManager.sendTokens(p, "The amount has to be a number. /addtokens <player> <amount>");
                return true;
            }
            mysql.addTokens(p, Integer.parseInt(args[1]));
            MessageManager.sendTokens(p, "Successfully added " + ChatColor.AQUA + args[1]  + " tokens"+ ChatColor.GRAY + " to " + ChatColor.YELLOW + args[0] + ChatColor.GRAY + ".");
        }
       
        if (cmd.getName().equalsIgnoreCase("removetokens")) {
            if (!(sender instanceof Player)) {
                Player sender1 = (Player) sender;
                MessageManager.sendTokens(sender1, "You can't run commands as the console");
                return true;
            }
            Player p = (Player) sender;
            if (!p.hasPermission("shockmc.tokens.remove")) {
                MessageManager.sendTokens(p, "You don't have enough permissions to " + ChatColor.YELLOW + "Remove tokens" + ChatColor.GRAY + ".");
                return true;
            }
            if (args.length == 0) {
                MessageManager.sendTokens(p, "You must specify a player. /removetokens <player> <amount>");
                return true;
            }
            Player player = Bukkit.getServer().getPlayer(args[0]);
            if (player == null) {
                MessageManager.sendTokens(p, "That player is not online, please do this in the database or on the admin panel.");
                return true;
            }
            try{
                Integer.parseInt(args[1]);
            }
            catch(Exception ex){
                MessageManager.sendTokens(p, "The amount has to be a number.");
                return true;
            }
            mysql.removeTokens(player, Integer.parseInt(args[1]));
            MessageManager.sendTokens(p, "Successfully removed " + ChatColor.AQUA + args[1] + " tokens" + ChatColor.GRAY + " from " + ChatColor.YELLOW + player.getName() + ChatColor.GRAY + ".");
            MessageManager.sendTokens(player, ChatColor.AQUA + args[1] + " tokens" + ChatColor.GRAY + " were removed from your account. Your balance is now " + mysql.getPlayerTokens(player) + " tokens.");
        }
       
        if (cmd.getName().equalsIgnoreCase("tokens")) {
            if (!(sender instanceof Player)) {
                Player sender1 = (Player) sender;
                MessageManager.sendTokens(sender1, "You can't run commands as the console");
                return true;
            }
            Player p = (Player) sender;
            if (args.length == 0) {
                MessageManager.sendTokens(p, "Your current token balance: " + ChatColor.YELLOW + mysql.getPlayerTokens(p));
                return true;
            }
            Player player = Bukkit.getServer().getPlayer(args[0]);
            if (player == null) {
                MessageManager.sendTokens(p, "That player isn't on the server.");
                return true;
            }
            MessageManager.sendTokens(p, ChatColor.YELLOW + player.getName() + ChatColor.GRAY + "'s token balance is " + ChatColor.AQUA + mysql.getPlayerTokens(player) + ChatColor.GRAY);
            return true;
        }
       
        if (cmd.getName().equalsIgnoreCase("removebounty")) {
            Player p = (Player) sender;
            MessageManager.sendBounty(p, "Feature coming soon.");
        }
        if (cmd.getName().equalsIgnoreCase("setbounty")) {
            Player p = (Player) sender;
            MessageManager.sendBounty(p, "Feature coming soon.");
        }
        if (cmd.getName().equalsIgnoreCase("checkbounty")) {
            Player p = (Player) sender;
            MessageManager.sendBounty(p, "Feature coming soon.");
        }
       
        if (cmd.getName().equalsIgnoreCase("setcoalarena")) {
            Player p = (Player) sender;
            getConfig().set("coal.world", p.getLocation().getWorld().getName());
            getConfig().set("coal.x", p.getLocation().getX());
            getConfig().set("coal.y", p.getLocation().getY());
            getConfig().set("coal.z", p.getLocation().getZ());
            saveConfig();
            MessageManager.sendGood(p, "Coal arena spawn set.");
        }
        if (cmd.getName().equalsIgnoreCase("setironarena")) {
            Player p = (Player) sender;
            getConfig().set("iron.world", p.getLocation().getWorld().getName());
            getConfig().set("iron.x", p.getLocation().getX());
            getConfig().set("iron.y", p.getLocation().getY());
            getConfig().set("iron.z", p.getLocation().getZ());
            saveConfig();
            MessageManager.sendGood(p, "Iron arena spawn set.");
        }
        if (cmd.getName().equalsIgnoreCase("setdiamondarena")) {
            Player p = (Player) sender;
            getConfig().set("diamond.world", p.getLocation().getWorld().getName());
            getConfig().set("diamond.x", p.getLocation().getX());
            getConfig().set("diamond.y", p.getLocation().getY());
            getConfig().set("diamond.z", p.getLocation().getZ());
            saveConfig();
            MessageManager.sendGood(p, "Diamond arena spawn set.");
        }
        if (cmd.getName().equalsIgnoreCase("setemeraldarena")) {
            Player p = (Player) sender;
            getConfig().set("emerald.world", p.getLocation().getWorld().getName());
            getConfig().set("emerald.x", p.getLocation().getX());
            getConfig().set("emerald.y", p.getLocation().getY());
            getConfig().set("emerald.z", p.getLocation().getZ());
            saveConfig();
            MessageManager.sendGood(p, "Emerald arena spawn set.");
        }
        if (cmd.getName().equalsIgnoreCase("setproarena")) {
            Player p = (Player) sender;
            getConfig().set("pro.world", p.getLocation().getWorld().getName());
            getConfig().set("pro.x", p.getLocation().getX());
            getConfig().set("pro.y", p.getLocation().getY());
            getConfig().set("pro.z", p.getLocation().getZ());
            saveConfig();
            MessageManager.sendGood(p, "Pro arena spawn set.");
        }
        return true;
    }

}

 

@ESSHD
Can we see a stack trace when you run the plugin?

 

@ark9026

Code:

[19:38:21 ERROR]: Could not pass event InventoryClickEvent to Kits v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:305) ~[custom.jar:git-Spigot-dbe012b-61ef214]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[custom.jar:git-Spigot-dbe012b-61ef214]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:502) [custom.jar:git-Spigot-dbe012b-61ef214]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:487) [custom.jar:git-Spigot-dbe012b-61ef214]
        at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java
:1618) [custom.jar:git-Spigot-dbe012b-61ef214]
        at net.minecraft.server.v1_8_R2.PacketPlayInWindowClick.a(SourceFile:31)
[custom.jar:git-Spigot-dbe012b-61ef214]
        at net.minecraft.server.v1_8_R2.PacketPlayInWindowClick.a(SourceFile:9)
[custom.jar:git-Spigot-dbe012b-61ef214]
        at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:1
3) [custom.jar:git-Spigot-dbe012b-61ef214]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_31]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_31]
        at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [custom.jar
:git-Spigot-dbe012b-61ef214]
        at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:7
10) [custom.jar:git-Spigot-dbe012b-61ef214]
        at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:3
68) [custom.jar:git-Spigot-dbe012b-61ef214]
        at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:6
51) [custom.jar:git-Spigot-dbe012b-61ef214]
        at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java
:554) [custom.jar:git-Spigot-dbe012b-61ef214]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: java.lang.NullPointerException
        at com.shockmc.kitpvp.listeners.InventoryInteract.onPlayerInteract(Inven
toryInteract.java:129) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor65.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_31]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_31]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:301) ~[custom.jar:git-Spigot-dbe012b-61ef214]
        ... 15 more
>

 

if (main.getConfig().getConfigurationSection("diamond") == null) {
this line is throwing the error

 

http://bukkit.org/threads/how-to-re...ubleshoot-your-own-plugins-by-yourself.32457/

 

@ESSHD
As @Neonix just said above, "if (main.getConfig().getConfigurationSection("diamond") == null) {"
is throwing a NullPointerException.

 

@ark9026 @teej107 @Neonix I know it's that line, but why is it doing it?

 

Let's look at your suspects

• main could be null
• getConfig() could return null

I bet you anything its the first one.

 

@teej107 It is, what could I do to fix this? I've tested it.

@teej107 Fixed it, thanks for your help.

EDIT by Timtower: merged posts

 

@ESSHD
Can you put the [Solved] tag at the top if it's fixed?