[09:49:23 ERROR]: Could not pass event InventoryClickEvent to KitPreview v5.2.7
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.PlayerConnection.a(PlayerConnection.java:1851) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.PacketPlayInWindowClick.a(SourceFile:33) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.PacketPlayInWindowClick.a(SourceFile:10) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_112]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_112]
        at net.minecraft.server.v1_9_R2.SystemUtils.a(SourceFile:45) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:726) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_112]
Caused by: java.lang.NoSuchMethodError: net.ess3.api.IItemDb.serialize(Lorg/bukkit/inventory/ItemStack;)Ljava/lang/String;
        at com.songoda.kitpreview.sf9afu0afuas0fjasmerpoweja0eiuad08audas0fuafaduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaasfkasjfsdas89dasyd3wnldjhwopij120duj80d0ssjd.fasjdfhasds87shcsadfh8eaeaoijada0dusafafafduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafa.fasjdfhasds87shcsadfh8eaeaoijada0dusafafafduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafa(SourceFile:177) ~[?:?]
        at com.songoda.kitpreview.asfkasjfsdas89dasyd3wnldjhwopij120duj80d0ssjdasfkasjfsdas89dasyd3wnldjhwopij120duj80d0ssjdaxcxxxa0a9sdusa0duasfsfuas0ffys088fsa90s8fsaf.sf9afu0afuas0fjasmerpoweja0eiuad08audas0fuafaduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaasfkasjfsdas89dasyd3wnldjhwopij120duj80d0ssjd.duya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaaxcxxxa0a9sdusa0duasfsfuas0ffys088fsa90s8fsaf(SourceFile:521) ~[?:?]
        at com.songoda.kitpreview.duya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaaxcxxxa0a9sdusa0duasfsfuas0ffys088fsa90s8fsaf.asfkasjfsdas89dasyd3wnldjhwopij120duj80d0ssjdasfkasjfsdas89dasyd3wnldjhwopij120duj80d0ssjdaxcxxxa0a9sdusa0duasfsfuas0ffys088fsa90s8fsaf.fasjdfhasds87shcsadfh8eaeaoijada0dusafafafduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafaduya98dayhsaonjenr398rha9f8ayhfas80fsfa0sfafa(SourceFile:142) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_112]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_112]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_112]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_112]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        ... 15 more