[11:23:30 ERROR]: Could not pass event UpdateEvent to UltraCustomizer v1.0.1
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot.jar:git-Spigot-21fe707-e1ebe52]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-21fe707-e1ebe52]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at me.TechsCode.UltraCustomizer.tpl.task.TaskManager$1.run(TaskManager.java:27) [UltraCustomizer.jar:?]
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:723) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot.jar:git-Spigot-21fe707-e1ebe52]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_201]
Caused by: java.lang.NullPointerException
	at me.TechsCode.UltraCustomizer.gui.interfaceEditor.InterfaceBrowser.getButton(InterfaceBrowser.java:66) ~[?:?]
	at me.TechsCode.UltraCustomizer.gui.interfaceEditor.InterfaceBrowser.getButton(InterfaceBrowser.java:14) ~[?:?]
	at me.TechsCode.UltraCustomizer.tpl.gui.PageableGUI.lambda$getGUIItems$0(PageableGUI.java:63) ~[?:?]
	at java.util.Spliterators$ArraySpliterator.forEachRemaining(Unknown Source) ~[?:1.8.0_201]
	at java.util.stream.ReferencePipeline$Head.forEach(Unknown Source) ~[?:1.8.0_201]
	at me.TechsCode.UltraCustomizer.tpl.gui.PageableGUI.getGUIItems(PageableGUI.java:63) ~[?:?]
	at me.TechsCode.UltraCustomizer.tpl.gui.GUI.sync(GUI.java:78) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_201]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-21fe707-e1ebe52]
	... 11 more