Problem / ERROR

[16:49:27] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to pc-PlayerProtection-1.8.8 v1.8.8
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[mc.jar:git-PaperSpigot-"4c7641d"]
    at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[mc.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[mc.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:517) [mc.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:502) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:314) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:173) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:144) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:54) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:231) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:148) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:875) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [mc.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [mc.jar:git-PaperSpigot-"4c7641d"]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
Caused by: java.lang.NullPointerException
    at pietregcode.pietreg.protectionplayers.listeners.PlayerJoinListnener.onJoin(PlayerJoinListnener.java:32) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_161]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_161]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_161]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_161]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[mc.jar:git-PaperSpigot-"4c7641d"]
    ... 15 more

    @EventHandler
    public void onJoin(PlayerJoinEvent e) {
        Player p = e.getPlayer();
        User u = UserManager.getUser(p);
        if (p.getName().equals("Killeerek01")) {
            p.sendMessage(ChatUtil.fixColor("&6Ten serwer uzywa twojego pluginu! &4<3"));
        }
        if (u == null) {
            UserManager.createrUser(p);
            if (!Config.PROTECTION_TIME_FRISTJOIN_STATUS) {
                return;
            }
            u.setTimeProtect(System.currentTimeMillis() + TimeUtil.MINUTE.getTime(4));
            String mm = Config.PROTECTION_NAMETAG;
            TagApi.setTag((User) p, mm);
            String m = Config.PROTECTION_TIME_FRISTJOIN_START;
            m = m.replace("{TIME}", Integer.toString(Config.PROTECTION_TIME_FRISTJOIN));
            ChatUtil.sendMsg(p, m);
        }
    }

}
 

import java.sql.ResultSet;
import java.sql.SQLException;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;

import pietregcode.pietreg.protectionplayers.ProtectionPlugin;

public class User
{
    private String name;
    private long ochronatime;
    private long ochronadedtime;

    public User(final Player p) {
        this.name = p.getName();
        this.ochronatime = 0L;
        this.ochronadedtime = 0L;
        this.insert();
    }

    public User(final ResultSet rs) throws SQLException{
        this.name = rs.getString("name");
        this.ochronatime = rs.getLong("protection");
        this.ochronadedtime = rs.getLong("protectionded");
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public long getTimeProtect() {
        return ochronatime;
    }

    public void setTimeProtect(long ochrona) {
        this.ochronatime = ochrona;
        ProtectionPlugin.getStore().update(false, "UPDATE `{P}users` SET `protection`='" + this.getTimeProtect() + "' WHERE `name`='" + this.getName() + "'");
    }

    public long getTimeProtectDead() {
        return ochronadedtime;
    }

    public void setTimeProtectDead(long ochrona) {
        this.ochronadedtime = ochrona;
        ProtectionPlugin.getStore().update(false, "UPDATE `{P}users` SET `protectionded` ='" + this.getTimeProtectDead() + "' WHERE `name` ='" + this.getName() + "'");
    }

    public Player getPlayer() {
        return Bukkit.getPlayer(this.getName());
    }

    public boolean isOnline() {
        return this.getPlayer() != null;
    }

    private void insert() {
        ProtectionPlugin.getStore().update(false, "INSERT INTO `{P}users`(`id`, `name`, `protection`, `protectionded`) VALUES (NULL, '" + this.getName() + "','" + this.getTimeProtect() + "','" + this.getTimeProtectDead() + "')");
    }

    public void save() {
        ProtectionPlugin.getStore().update(false, "UPDATE `{P}users` SET `protection` = '" + this.getTimeProtect() + "', `protectionded` = '" + this.getTimeProtectDead() + "' WHERE `name` ='" + this.getName() + "';");
    }

    public boolean isProtect() {
        return this.getTimeProtect() >=  System.currentTimeMillis();
    }

    public boolean isProtectDead() {
        return this.getTimeProtectDead() >= System.currentTimeMillis();
    }
}