Cannot invoke "polkilopelmeniy.api_control_panel.getConfig()" because "this.config" is null

Code:

package polkilopelmeniy;

import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
public class break_block implements Listener {

    api_control_panel config;
    public break_block(api_control_panel instance){
        config = instance;
    }

    int score_diamond = config.getConfig().getInt("Diamond");
    int score_iron = config.getConfig().getInt("Iron");
    int score_emerald = config.getConfig().getInt("Emerald");
    int score_coal = config.getConfig().getInt("Coal");
    int score_gold = config.getConfig().getInt("Gold");
    int score_copper = config.getConfig().getInt("Copper");
    int score_redstone = config.getConfig().getInt("Redstone");
    int score_lapis = config.getConfig().getInt("Lapis");
    @EventHandler
    public void blockBreak(BlockBreakEvent event){
        Block block = event.getBlock();
        Material material = block.getType();
        Player player = event.getPlayer();
        if(material.equals(Material.DIAMOND_ORE) | material.equals(Material.DEEPSLATE_DIAMOND_ORE)){
            score_diamond = score_diamond + 1;
            config.getConfig().set("Diamond", score_diamond);
            config.saveConfig();
            config.reloadConfig();
            player.sendMessage(ChatColor.AQUA + "Diamonds mined: " + score_diamond);
        }
        if(material.equals(Material.IRON_ORE) | material.equals(Material.DEEPSLATE_IRON_ORE)){
            score_iron = score_iron + 1;
            config.getConfig().set("Iron", score_iron);
            config.saveConfig();
            config.reloadConfig();
            player.sendMessage(ChatColor.WHITE + "Iron mined: " + score_iron);
        }
        if(material.equals(Material.EMERALD_ORE) | material.equals(Material.DEEPSLATE_EMERALD_ORE)){
            score_emerald = score_emerald + 1;
            config.getConfig().set("Emerald", score_emerald);
            config.saveConfig();
            config.reloadConfig();
            player.sendMessage(ChatColor.GREEN + "Emerald mined: " + score_emerald);
        }
        if(material.equals(Material.COAL_ORE) | material.equals(Material.DEEPSLATE_COAL_ORE)){
            score_coal = score_coal + 1;
            config.getConfig().set("Coal", score_coal);
            config.saveConfig();
            config.reloadConfig();
            player.sendMessage(ChatColor.GRAY + "Coal mined: " + score_coal);
        }
        if(material.equals(Material.GOLD_ORE) | material.equals(Material.DEEPSLATE_GOLD_ORE)){
            score_gold = score_gold + 1;
            config.getConfig().set("Gold", score_gold);
            config.saveConfig();
            config.reloadConfig();
            player.sendMessage(ChatColor.YELLOW + "Gold mined: " + score_gold);
        }
        if(material.equals(Material.COPPER_ORE) | material.equals(Material.DEEPSLATE_COPPER_ORE)){
            score_copper = score_copper + 1;
            config.getConfig().set("Copper", score_copper);
            config.saveConfig();
            config.reloadConfig();
            player.sendMessage(ChatColor.GOLD + "Copper mined: " + score_copper);
        }
        if(material.equals(Material.REDSTONE_ORE) | material.equals(Material.DEEPSLATE_REDSTONE_ORE)){
            score_redstone = score_redstone + 1;
            config.getConfig().set("Redstone", score_redstone);
            config.saveConfig();
            config.reloadConfig();
            player.sendMessage(ChatColor.RED + "Redstone mined: " + score_redstone);
        }
        if(material.equals(Material.LAPIS_ORE) | material.equals(Material.DEEPSLATE_LAPIS_ORE)){
            score_lapis = score_lapis + 1;
            config.getConfig().set("Lapis", score_lapis);
            config.saveConfig();
            config.reloadConfig();
            player.sendMessage(ChatColor.BLUE + "Lapis Lazuli mined: " + score_lapis);
        }
    }
}

Code:

package polkilopelmeniy;[/INDENT]

import org.bukkit.plugin.java.JavaPlugin;
import java.io.File;

public final class api_control_panel extends JavaPlugin {

    @Override
    public void onEnable() {
        File file = new File(getDataFolder() + File.separator + "config.yml");


        if (!file.exists()){
            getConfig().addDefault("Diamond", 0);
            getConfig().addDefault("Iron", 0);
            getConfig().addDefault("Emerald", 0);
            getConfig().addDefault("Coal", 0);
            getConfig().addDefault("Gold", 0);
            getConfig().addDefault("Copper", 0);
            getConfig().addDefault("Redstone", 0);
            getConfig().addDefault("Lapis", 0);
            getConfig().options().copyDefaults(true);
            saveConfig();
        } else {
            CheckConfig();
            saveConfig();
            reloadConfig();
        }
        this.getServer().getPluginManager().registerEvents(new break_block(this), this);
    }

    public void CheckConfig() {

        if(getConfig().get("Coal") == null){
            getConfig().set("Coal", 0);
            saveConfig();
            reloadConfig();

        }

    }

    @Override
    public void onDisable() {

    }
}

Code:

Error occurred while enabling Api_Control_Panel v1.0-SNAPSHOT (Is it up to date?)[/INDENT]
java.lang.NullPointerException: Cannot invoke "polkilopelmeniy.api_control_panel.getConfig()" because "this.config" is null
    at polkilopelmeniy.break_block.<init>(break_block.java:17) ~[?:?]
    at polkilopelmeniy.api_control_panel.onEnable(api_control_panel.java:29) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[spigot-api-1.19-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:342) ~[spigot-api-1.19-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:479) ~[spigot-api-1.19-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.craftbukkit.v1_19_R1.CraftServer.enablePlugin(CraftServer.java:523) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at org.bukkit.craftbukkit.v1_19_R1.CraftServer.enablePlugins(CraftServer.java:437) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at org.bukkit.craftbukkit.v1_19_R1.CraftServer.reload(CraftServer.java:922) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at org.bukkit.Bukkit.reload(Bukkit.java:801) ~[spigot-api-1.19-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:27) ~[spigot-api-1.19-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[spigot-api-1.19-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.craftbukkit.v1_19_R1.CraftServer.dispatchCommand(CraftServer.java:831) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at org.bukkit.craftbukkit.v1_19_R1.CraftServer.dispatchServerCommand(CraftServer.java:816) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at net.minecraft.server.dedicated.DedicatedServer.bg(DedicatedServer.java:419) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at net.minecraft.server.dedicated.DedicatedServer.b(DedicatedServer.java:395) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1197) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at net.minecraft.server.MinecraftServer.v(MinecraftServer.java:1010) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:291) ~[spigot-1.19-R0.1-SNAPSHOT.jar:3545-Spigot-475f600-4230f8f]
    at java.lang.Thread.run(Thread.java:833) [?:?]

 

@timtower Thank you!