17.02 16:03:22 [Server] INFO HeroGirl61 issued server command: /ah
17.02 16:03:22 [Server] ERROR null
17.02 16:03:22 [Server] INFO org.bukkit.command.CommandException: Unhandled exception executing command 'ah' in plugin AuctionHouse v3.3
17.02 16:03:22 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) ~[spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1397) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1232) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_72]
17.02 16:03:22 [Server] INFO at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_72]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]
17.02 16:03:22 [Server] INFO Caused by: java.lang.IllegalArgumentException: Cannot copy null stack
17.02 16:03:22 [Server] INFO at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:135) ~[spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO at net.cfilatov.auctionhouse.menu.MenuRenderer.renderAuctionPage(MenuRenderer.java:119) ~[?:?]
17.02 16:03:22 [Server] INFO at net.cfilatov.auctionhouse.menu.MenuRenderer.openAuction(MenuRenderer.java:37) ~[?:?]
17.02 16:03:22 [Server] INFO at net.cfilatov.auctionhouse.commands.CommandHandler.handleAuction(CommandHandler.java:81) ~[?:?]
17.02 16:03:22 [Server] INFO at net.cfilatov.auctionhouse.commands.CommandHandler.onCommand(CommandHandler.java:54) ~[?:?]
17.02 16:03:22 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.12.2.jar:git-Spigot-2086bb0-8cc5a7e]
17.02 16:03:22 [Server] INFO ... 15 more