Что обозначает данная ошибка в логах Minecraft?

[LeakAdmins]

[20:03:11] [Server thread/ERROR]: Could not pass event CMIPortalCreateEvent to CMI v9.0.1.2
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:319) ~[spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at com.Zrips.CMI.AllListeners.PlayerListeners.proccessEvent(PlayerListeners.java:894) [CMI9.0.1.2.jar:?]
at com.Zrips.CMI.AllListeners.PlayerListeners.PortalCreateEvent(PlayerListeners.java:756) [CMI9.0.1.2.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:315) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.BlockPortalShape.createPortal(BlockPortalShape.java:178) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.BlockFireAbstract.onPlace(BlockFireAbstract.java:62) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.BlockFire.onPlace(BlockFire.java:326) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.ItemStack.placeItem(ItemStack.java:255) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.PlayerInteractManager.a(PlayerInteractManager.java:494) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:1356) [?:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.PacketPlayInUseItem.a(PacketPlayInUseItem.java:27) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.PacketPlayInUseItem.a(PacketPlayInUseItem.java:1) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.PlayerConnectionUtils$$Lambda$6598/1430043229.run(Unknown Source) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(SourceFile:144) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(SourceFile:118) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:942) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:935) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.awaitTasks(SourceFile:127) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.MinecraftServer.sleepForTick(MinecraftServer.java:919) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:851) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:164) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at net.minecraft.server.v1_16_R3.MinecraftServer$$Lambda$3234/140872617.run(Unknown Source) [spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_51]
Caused by: java.lang.NoSuchFieldError: NetherPortal_Creation
at com.Zrips.CMI.AllListeners.PlayerListeners.CMIPortalCreateEvent(PlayerListeners.java:797) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_51]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_51]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:315) ~[spigot-1_16_5.jar:2991-Spigot-018b9a0-f3f3094]
... 35 more