[20:56:35 ERROR]: Could not pass event InventoryClickEvent to EasyTrading v3.1.2
a
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:305) ~[spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:502) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:487) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java
:1588) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.PacketPlayInWindowClick.a(SourceFile:31)
 [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.PacketPlayInWindowClick.a(SourceFile:9)
[spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spi
got-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_31]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_31]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:6
96) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:3
16) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:6
34) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:537) [spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: com.comphenix.protocol.reflect.FieldAccessException: No field with ty
pe int exists in class PacketPlayOutBlockChange.
        at com.comphenix.protocol.reflect.StructureModifier.writeInternal(Struct
ureModifier.java:332) ~[?:?]
        at com.comphenix.protocol.reflect.StructureModifier.write(StructureModif
ier.java:312) ~[?:?]
        at de.Truhera.EasyTrading.Methods.SignGUI.open(SignGUI.java:75) ~[?:?]
        at de.Truhera.EasyTrading.Events.MoneyInvClick.onMoneyInvClick(MoneyInvC
lick.java:241) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_31]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_31]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:301) ~[spigot-1.8.jar:git-Spigot-8a983f9-e81edfc]
        ... 14 more