Решено WE не меняет биом 1.6.4

Код:

java.lang.NoSuchFieldError: JUNGLE_EDGE
at com.sk89q.worldedit.bukkit.BukkitBiomeType.<clinit>(BukkitBiomeType.java:34)
at com.sk89q.worldedit.bukkit.BukkitBiomeTypes.get(BukkitBiomeTypes.java:29)
at com.sk89q.worldedit.commands.BiomeCommands.setBiome(BiomeCommands.java:138)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.sk89q.minecraft.util.commands.CommandsManager.invokeMethod(CommandsManager.java:533)
at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.java:258)
at com.sk89q.worldedit.WorldEdit$1.invokeMethod(WorldEdit.java:189)
at com.sk89q.minecraft.util.commands.CommandsManager.executeMethod(CommandsManager.java:520)
at com.sk89q.minecraft.util.commands.CommandsManager.execute(CommandsManager.java:425)
at com.sk89q.worldedit.WorldEdit.handleCommand(WorldEdit.java:1464)
at com.sk89q.worldedit.bukkit.WorldEditPlugin.onCommand(WorldEditPlugin.java:242)
at com.sk89q.bukkit.util.DynamicPluginCommand.execute(DynamicPluginCommand.java:52)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:192)
at org.bukkit.craftbukkit.v1_6_R3.CraftServer.dispatchCommand(CraftServer.java:533)
at net.minecraft.network.NetServerHandler.func_72566_d(NetServerHandler.java:1405)
at net.minecraft.network.NetServerHandler.chat(NetServerHandler.java:1269)
at net.minecraft.network.NetServerHandler.func_72481_a(NetServerHandler.java:1201)
at net.minecraft.network.packet.Packet3Chat.func_73279_a(Packet3Chat.java:68)
at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:470)
at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:233)
at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:54)
at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(DedicatedServerListenThread.java:34)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:910)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:330)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:777)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:659)
at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
Connection reset

Решение: понизить версию плагина (с 5.6 до 5.5.8)