Question Items of the plug-in are not displayed

Installed MythicMobs after entering the command / mm items get object, produces an error

LOGS:

Code:

[22:25:03] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'mm' in plugin MythicMobs v4.3.2-SNAPSHOT
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchCommand(CraftServer.java:645) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PlayerConnection.handleCommand(PlayerConnection.java:1302) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:1137) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [Spigot.jar:git-Spigot-7d15d07-c194444]
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
at java.base/java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:716) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:655) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:554) [Spigot.jar:git-Spigot-7d15d07-c194444]
at java.base/java.lang.Thread.run(Unknown Source) [?:?]
Caused by: java.lang.IllegalArgumentException: Item cannot be null
at org.apache.commons.lang.Validate.noNullElements(Validate.java:364) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftInventory.addItem(CraftInventory.java:266) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at io.lumine.xikage.mythicmobs.commands.items.GetCommand.onCommand(GetCommand.java:44) ~[?:?]
at io.lumine.utils.commands.Command.onCommand(Command.java:69) ~[?:?]
at io.lumine.utils.commands.Command.onCommand(Command.java:60) ~[?:?]
at io.lumine.utils.commands.Command.onCommand(Command.java:60) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
... 15 more
[22:26:04] [Server thread/INFO]: BoxIdeas issued server command: /mm items get KingsCrown
[22:26:04] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'mm' in plugin MythicMobs v4.3.2-SNAPSHOT
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchCommand(CraftServer.java:645) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PlayerConnection.handleCommand(PlayerConnection.java:1302) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:1137) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [Spigot.jar:git-Spigot-7d15d07-c194444]
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:?]
at java.base/java.util.concurrent.FutureTask.run(Unknown Source) [?:?]
at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:716) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:655) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:554) [Spigot.jar:git-Spigot-7d15d07-c194444]
at java.base/java.lang.Thread.run(Unknown Source) [?:?]
Caused by: java.lang.IllegalArgumentException: Item cannot be null
at org.apache.commons.lang.Validate.noNullElements(Validate.java:364) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftInventory.addItem(CraftInventory.java:266) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at io.lumine.xikage.mythicmobs.commands.items.GetCommand.onCommand(GetCommand.java:44) ~[?:?]
at io.lumine.utils.commands.Command.onCommand(Command.java:69) ~[?:?]
at io.lumine.utils.commands.Command.onCommand(Command.java:60) ~[?:?]
at io.lumine.utils.commands.Command.onCommand(Command.java:60) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
... 15 more
[22:26:18] [Server thread/INFO]: [LumineUtils] (io.lumine.utils.) is bound to plugin MythicMobs - io.lumine.xikage.mythicmobs.MythicMobs
[22:26:18] [Server thread/ERROR]: [MythicMobs] [SCHEDULER] Exception thrown whilst executing task
[22:26:18] [Server thread/WARN]: java.lang.NullPointerException
[22:26:18] [Server thread/WARN]: at io.lumine.xikage.mythicmobs.mobs.EquipmentManager.setEquipment(EquipmentManager.java:64)
[22:26:18] [Server thread/WARN]: at io.lumine.xikage.mythicmobs.mobs.MythicMob.lambda$applyMobOptions$3(MythicMob.java:868)
[22:26:18] [Server thread/WARN]: at io.lumine.utils.tasks.Scheduler.lambda$runLaterSync$10(Scheduler.java:292)
[22:26:18] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71)
[22:26:18] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350)
[22:26:18] [Server thread/WARN]: at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:724)
[22:26:18] [Server thread/WARN]: at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400)
[22:26:18] [Server thread/WARN]: at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:655)
[22:26:18] [Server thread/WARN]: at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:554)
[22:26:18] [Server thread/WARN]: at java.base/java.lang.Thread.run(Unknown Source)
[22:27:02] [Server thread/ERROR]: [MythicMobs] [SCHEDULER] Exception thrown whilst executing task
[22:27:02] [Server thread/WARN]: java.lang.NullPointerException
[22:27:02] [Server thread/WARN]: at io.lumine.xikage.mythicmobs.mobs.EquipmentManager.setEquipment(EquipmentManager.java:64)
[22:27:02] [Server thread/WARN]: at io.lumine.xikage.mythicmobs.mobs.MythicMob.lambda$applyMobOptions$3(MythicMob.java:868)
[22:27:02] [Server thread/WARN]: at io.lumine.utils.tasks.Scheduler.lambda$runLaterSync$10(Scheduler.java:292)
[22:27:02] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71)
[22:27:02] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350)
[22:27:02] [Server thread/WARN]: at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:724)
[22:27:02] [Server thread/WARN]: at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400)
[22:27:02] [Server thread/WARN]: at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:655)
[22:27:02] [Server thread/WARN]: at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:554)
[22:27:02] [Server thread/WARN]: at java.base/java.lang.Thread.run(Unknown Source)
[22:27:23] [Server thread/INFO]: BoxIdeas lost connection: Internal Exception: java.io.IOException: Удаленный хост принудительно разорвал существующее подключение
[22:27:23] [Server thread/INFO]: BoxIdeas left the game.
[22:27:23] [Server thread/WARN]: [Essentials] Task #771 for Essentials v2.15.0.1 generated an exception
java.lang.NullPointerException
at com.earth2me.essentials.xmpp.XMPPManager.updatePresence(XMPPManager.java:144) ~[?:?]
at com.earth2me.essentials.xmpp.EssentialsXMPP.updatePresence(EssentialsXMPP.java:109) ~[?:?]
at com.earth2me.essentials.xmpp.EssentialsXMPPPlayerListener$2.run(EssentialsXMPPPlayerListener.java:51) ~[?:?]
at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:724) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:655) [Spigot.jar:git-Spigot-7d15d07-c194444]
at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:554) [Spigot.jar:git-Spigot-7d15d07-c194444]
at java.base/java.lang.Thread.run(Unknown Source) [?:?]
[22:27:27] [Server thread/INFO]: Stopping the server
[22:27:27] [Server thread/INFO]: Stopping server
[22:27:27] [Server thread/INFO]: Saving players
[22:27:27] [Server thread/INFO]: Saving worlds
[22:27:27] [Server thread/INFO]: Saving chunks for level 'world'/Overworld
[22:27:27] [Server thread/INFO]: Saving chunks for level 'world_nether'/Nether
[22:27:27] [Server thread/INFO]: Saving chunks for level 'world_the_end'/The End

 

are not getting!