[00:25:08] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'shopmenu' in plugin HyperMerchant v1.58-dev
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.PlayerConnection.handleCommand(PlayerConnection.java:1139) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:974) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_45]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_45]
	at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:712) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]
Caused by: java.lang.NullPointerException
	at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:94) ~[spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	at grokswell.util.HyperToBukkit.getItemStack(HyperToBukkit.java:21) ~[?:?]
	at grokswell.hypermerchant.ShopMenu.loadPage(ShopMenu.java:192) ~[?:?]
	at grokswell.hypermerchant.ShopMenu.<init>(ShopMenu.java:115) ~[?:?]
	at grokswell.hypermerchant.HyperMerchantPlugin.onCommand(HyperMerchantPlugin.java:135) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot1.8.3.jar:git-Spigot-2ec6f06-7722428]
	... 15 more