[19:24:24] [pool-2-thread-1/ERROR]: Could not pass event InventoryClickEvent to Miku v1.0
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:282) ~[Chika.jar:1.0.0-SNAPSHOT]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[Chika.jar:1.0.0-SNAPSHOT]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[Chika.jar:1.0.0-SNAPSHOT]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:497) ~[Chika.jar:1.0.0-SNAPSHOT]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:481) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:1511) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.PacketPlayInWindowClick.a(PacketPlayInWindowClick.java:19) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.PacketPlayInWindowClick.handle(PacketPlayInWindowClick.java:69) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:334) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:86) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:871) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:310) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:722) ~[Chika.jar:1.0.0-SNAPSHOT]
	at net.minecraft.server.v1_7_R4.MinecraftServer.lambda$run$0(MinecraftServer.java:611) ~[Chika.jar:1.0.0-SNAPSHOT]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [?:1.8.0_212]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_212]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [?:1.8.0_212]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_212]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_212]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.lang.NoClassDefFoundError: strafe/games/practice/menu/duel/DuelMenu$SelectArenaMenu
	at strafe.games.practice.menu.duel.DuelMenu$DuelRequestButton.clicked(DuelMenu.java:106) ~[?:?]
	at strafe.games.core.util.menu.ButtonListener.onButtonPress(ButtonListener.java:53) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_212]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_212]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:280) ~[Chika.jar:1.0.0-SNAPSHOT]
	... 20 more