Error on plugin loading

Code (Text):

org.bukkit.plugin.InvalidPluginException: java.lang.ExceptionInInitializerError
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:326) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:248) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:298) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.reload(CraftServer.java:743) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.Bukkit.reload(Bukkit.java:525) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:641) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:627) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:443) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.ExceptionInInitializerError
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_144]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_144]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        ... 14 more
Caused by: java.lang.NullPointerException
        at xyz.blockbyblock.core.BlockByBlock.<clinit>(BlockByBlock.java:14) ~[?:?]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_144]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_144]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        ... 14 more

It comes up with that, what is wrong?

 

Code (Text):

package xyz.blockbyblock.core.commands;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import xyz.blockbyblock.core.BlockByBlock;

public class commandBBB implements CommandExecutor {

    @Override
    public boolean onCommand(CommandSender s, Command cmd, String label, String[] args) {
        Player p = (Player) s;
       
        if (cmd.getName().equalsIgnoreCase("bbb")) {
            if (p.hasPermission("bbb.use")) {
               
                if (args[0] == "reload") {
                    p.sendMessage(ChatColor.translateAlternateColorCodes('&', BlockByBlock.prefix + "&aConfiguration reloaded..."));
                } else if (args[0] == "info") {
                    p.sendMessage(BlockByBlock.config.getString("info"));
                } else if (args.length < 0) {
                    p.sendMessage("/bbb <info/reload>");
                } else if (args[0] != "info" || args[0] != "reload") {
                    p.sendMessage("/bbb <info/reload>");
                }
               
            } else if (!(p.hasPermission("bbb.use"))) {
                p.sendMessage(BlockByBlock.noaccess);
            }
        }
        return false;
    }
   
}

Code (Text):

package xyz.blockbyblock.core;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

import xyz.blockbyblock.core.commands.commandBBB;

public class BlockByBlock extends JavaPlugin {
   
    public static String prefix = ChatColor.translateAlternateColorCodes('&', BlockByBlock.config.getString("prefix") + " ");
    public static String noaccess = ChatColor.translateAlternateColorCodes('&', BlockByBlock.prefix + BlockByBlock.config.getString("noaccess"));
    public static FileConfiguration config = Bukkit.getPluginManager().getPlugin("BBB-Core").getConfig();
   
    public static void send(Player p, String msg) {
        p.sendMessage(msg);
    }
   
    @Override
    public void onEnable() {
        System.out.println("BBB-Core : Enabled!");
       
        getConfig().options().copyDefaults(true);
        saveConfig();
       
        getCommand("bbb").setExecutor(new commandBBB());
    }
   
    @Override
    public void onDisable() {
        System.out.println("BBB-Core : Disabled!");
    }
   
}

@Minesuchtiiii
@KaliCode