Помогите На сервере не работает команда /ah из плагина AuctionHouse

В консоле выдает вот это :
>[2K [18:29:43 INFO]: Arsenikk issued server command: /ah
>[2K [18:29:43 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'ah' in plugin AuctionHouse v3.3
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:629) ~[craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1338) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1198) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_221]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_221]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:696) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555) [craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_221]
Caused by: java.lang.IllegalArgumentException: Cannot copy null stack
at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at org.*********ventory.ItemStack.(ItemStack.java:135) ~[craftbukkit-1.12.2.jar:git-Bukkit-809c399]
at net.cfilatov.auctionhouse.menu.MenuRenderer.renderAuctionPage(MenuRenderer.java:119) ~[?:?]
at net.cfilatov.auctionhouse.menu.MenuRenderer.openAuction(MenuRenderer.java:37) ~[?:?]
at net.cfilatov.auctionhouse.commands.CommandHandler.handleAuction(CommandHandler.java:81) ~[?:?]
at net.cfilatov.auctionhouse.commands.CommandHandler.onCommand(CommandHandler.java:54) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit-1.12.2.jar:git-Bukkit-809c399]
... 15 more

 

Попробуй на офф. странице плагина на Spigot ещё раз скачать, там есть отдельная версия для 1.12.2 и 1.15.2. Или же перейди на CrazyAuctions.