skyblock menu issues

[UltraBlackLinux]

all Craft menu gui parts but the barrier (just duplicates) can be moved, also into the inventory:

[08:41:06 ERROR]: Could not pass event InventoryClickEvent to Skyblock v1.0.0
org.bukkit.event.EventException: null
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-21fe707-741a1bd]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-21fe707-741a1bd]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-21fe707-741a1bd]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-21fe707-741a1bd]
	at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1630) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-21fe707-741a1bd]

Closing the craft menu gui automatically picks up the barrier from the main menu and completely disables it's interactivity. All items can be moved, none react to clicks.

The pet menu close and back buttons don't work