Used console command: "customgui clickitem give clickitem1 donvdp 5"

exception output:

[16:20:00] [Server thread/WARN]: Unexpected exception while parsing console command "customgui"
org.bukkit.command.CommandException: Unhandled exception executing command 'customgui' in plugin CustomGUI v2.2.1
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-db6de12-d3e0b6f]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-db6de12-d3e0b6f]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) ~[spigot.jar:git-Spigot-db6de12-d3e0b6f]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:627) [spigot.jar:git-Spigot-db6de12-d3e0b6f]
	at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:412) [spigot.jar:git-Spigot-db6de12-d3e0b6f]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375) [spigot.jar:git-Spigot-db6de12-d3e0b6f]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot.jar:git-Spigot-db6de12-d3e0b6f]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot.jar:git-Spigot-db6de12-d3e0b6f]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
	at me.jacobculley.customgui.CustomGUI.onCommand(CustomGUI.java:922) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-db6de12-d3e0b6f]
	... 8 more