16:24:38 [SEVERE] java.lang.IllegalAccessError: tried to access field net.minecraft.server.TileEntityMobSpawner.mobName from class org.bukkit.craftbukkit.block.CraftCreatureSpawner
16:24:38 [SEVERE] 	at org.bukkit.craftbukkit.block.CraftCreatureSpawner.getCreatureTypeId(CraftCreatureSpawner.java:29)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.bukkit.BukkitWorld.copyFromWorld(BukkitWorld.java:350)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.EditSession.rawGetBlock(EditSession.java:445)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.EditSession.getBlock(EditSession.java:365)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.EditSession.replaceBlocks(EditSession.java:1267)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.commands.RegionCommands.replace(RegionCommands.java:98)
16:24:38 [SEVERE] 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
16:24:38 [SEVERE] 	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
16:24:38 [SEVERE] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
16:24:38 [SEVERE] 	at java.lang.reflect.Method.invoke(Unknown Source)
16:24:38 [SEVERE] 	at com.sk89q.minecraft.util.commands.CommandsManager.invokeMethod(CommandsManager.java:455)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.java:160)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.java:103)
16:24:38 [SEVERE] 	at com.sk89q.minecraft.util.commands.CommandsManager.executeMethod(CommandsManager.java:448)
16:24:38 [SEVERE] 	at com.sk89q.minecraft.util.commands.CommandsManager.execute(CommandsManager.java:364)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.WorldEdit.handleCommand(WorldEdit.java:1239)
16:24:38 [SEVERE] 	at com.sk89q.worldedit.bukkit.WorldEditPlayerListener.onPlayerCommandPreprocess(WorldEditPlayerListener.java:85)
16:24:38 [SEVERE] 	at org.bukkit.plugin.java.JavaPluginLoader$5.execute(JavaPluginLoader.java:298)
16:24:38 [SEVERE] 	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:61)
16:24:38 [SEVERE] 	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:460)
16:24:38 [SEVERE] 	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:784)
16:24:38 [SEVERE] 	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:751)
16:24:38 [SEVERE] 	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:739)
16:24:38 [SEVERE] 	at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:33)
16:24:38 [SEVERE] 	at net.minecraft.server.NetworkManager.b(NetworkManager.java:231)
16:24:38 [SEVERE] 	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:101)
16:24:38 [SEVERE] 	at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
16:24:38 [SEVERE] 	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:543)
16:24:38 [SEVERE] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:441)
16:24:38 [SEVERE] 	at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)