Bukkit

Using MinecraftMarkt 3.6.4 on KCauldron for Minecraft 1.7.10 our server log is spammed with the following two errors when opening/closing player inventories.

The first one seems to be for players in survival mode:

[Server thread/ERROR] [Minecraft/]: Could not pass event InventoryClickEvent to MinecraftMarket v3.6.4
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:338) ~[JavaPluginLoader$1.class:1.7.10-1614.175]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[RegisteredListener.class:1.7.10-1614.175]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:507) [SimplePluginManager.class:1.7.10-1614.175]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:492) [SimplePluginManager.class:1.7.10-1614.175]
	at net.minecraft.network.NetHandlerPlayServer.func_147351_a(NetHandlerPlayServer.java:2015) [nh.class:?]
	at net.minecraft.network.play.client.C0EPacketClickWindow.func_148833_a(SourceFile:32) [ix.class:?]
	at net.minecraft.network.play.client.C0EPacketClickWindow.func_148833_a(SourceFile:10) [ix.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245) [ej.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [nc.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:991) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:431) [lt.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:809) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:669) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.NoSuchMethodError: org.bukkit.event.inventory.InventoryClickEvent.getClickedInventory()Lorg/bukkit/inventory/Inventory;
	at com.minecraftmarket.minecraftmarket.bukkit.utils.inventories.InventoryGUI$1.onInventoryClickEvent(InventoryGUI.java:94) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_151]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_151]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:334) ~[JavaPluginLoader$1.class:1.7.10-1614.175]
	... 13 more

The second one seems to be for players in creative mode:

[Server thread/ERROR] [Minecraft/]: Could not pass event InventoryCreativeEvent to MinecraftMarket v3.6.4
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:338) ~[JavaPluginLoader$1.class:1.7.10-1614.175]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[RegisteredListener.class:1.7.10-1614.175]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:507) [SimplePluginManager.class:1.7.10-1614.175]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:492) [SimplePluginManager.class:1.7.10-1614.175]
	at net.minecraft.network.NetHandlerPlayServer.func_147344_a(NetHandlerPlayServer.java:2163) [nh.class:?]
	at net.minecraft.network.play.client.C10PacketCreativeInventoryAction.func_148833_a(SourceFile:23) [jm.class:?]
	at net.minecraft.network.play.client.C10PacketCreativeInventoryAction.func_148833_a(SourceFile:9) [jm.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245) [ej.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [nc.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:991) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:431) [lt.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:809) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:669) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.NoSuchMethodError: org.bukkit.event.inventory.InventoryClickEvent.getClickedInventory()Lorg/bukkit/inventory/Inventory;
	at com.minecraftmarket.minecraftmarket.bukkit.utils.inventories.InventoryGUI$1.onInventoryClickEvent(InventoryGUI.java:94) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_151]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_151]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:334) ~[JavaPluginLoader$1.class:1.7.10-1614.175]
	... 13 more

 Any help would be appreciated.