InventoryClickEvent

hi I have a problem with the code that generates the error and I can't handle it myself ... Please help

Code:

[19:11:07 ERROR]: Could not pass event InventoryClickEvent to aCORE v1.2-SNAPSHOT
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1630) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.PacketPlayInWindowClick.a(SourceFile:31) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.PacketPlayInWindowClick.a(SourceFile:9) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_231]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_231]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot.jar:git-Spigot-db6de12-18fbb24]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_231]
Caused by: java.lang.NullPointerException
        at com.gmail.pvtr.listeners.inventory.InventoryClickerListener.onInteract(InventoryClickerListener.java:55) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_231]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_231]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-db6de12-18fbb24]
        ... 15 more

My code:

Code:

      @EventHandler
      public void onInteract(final InventoryClickEvent e) {
          final Player p = (Player)e.getWhoClicked();
          if (e.getInventory().getName().equalsIgnoreCase(ChatUtil.fixColors("&8(&fDiscoZbroja&8)&7 - Menu"))) {
              e.setCancelled(true);
          }
              if (e.getClickedInventory().getName() == null) {
                  return;
              }
              if (e.getCurrentItem().getItemMeta().getDisplayName().equals(ChatUtil.fixColors("&8&lDISCO-ZBROJA"))) {
                  if (!DataManager.getDisco().containsKey(p.getName())) {
                      DataManager.getDisco().put(p.getName(), ArmorType.RANDOM);
                      ChatUtil.sendMessage((CommandSender)p, "&8>> &7Tryb disco zbroji zostal ustawiony na &2RANDOM");
                      DiscoMenu.inv(p);
                      return;
                  }
                  if (DataManager.getDisco().get(p.getName()).equals(ArmorType.RANDOM)) {
                      DataManager.getDisco().put(p.getName(), ArmorType.SMOOTH);
                      DataManager.getLastColor().put(p.getName(), Color.fromRGB(255, 0, 0));
                      ChatUtil.sendMessage((CommandSender)p, "&8>> &7Tryb disco zbroji zostal ustawiony na &2SMOOTH");
                      DiscoMenu.inv(p);
                      return;
                  }
                  if (DataManager.getDisco().get(p.getName()).equals(ArmorType.SMOOTH)) {
                      DataManager.getDisco().put(p.getName(), ArmorType.GRAY);
                      DataManager.getLastColor().put(p.getName(), Color.fromRGB(255, 0, 0));
                      ChatUtil.sendMessage((CommandSender)p, "&8>> &7Tryb disco zbroji zostal ustawiony na &2GRAY");
                      DiscoMenu.inv(p);
                      return;
                  }
                  if (DataManager.getDisco().get(p.getName()).equals(ArmorType.GRAY)) {
                      for (int i = 0; i < 4; ++i) {
                          for (final Player online : Bukkit.getOnlinePlayers()) {
                              if (!online.getName().equals(p.getName())) {
                                  PacketEquipment.sendEquipment(online, p.getEntityId(), 1 + i, p.getInventory().getArmorContents()[i]);
                              }
                          }
                      }
                      DataManager.getDisco().remove(p.getName());
                      DataManager.getLastColor().remove(p.getName());
                      DataManager.getShiftArmor().remove(p.getName());
                      ChatUtil.sendMessage((CommandSender)p, "&8>> &7Tryb disco zbroji zostal ustawiony na &2OFF");
                      DiscoMenu.inv(p);

this is a 55 line

Code:

if (e.getClickedInventory().getName() == null) {

 

Thank you very much! it works!