Помогите Forestry краш сервера

Всем привет, начал сервер падать из за одной ошибки forestry, вот такой:

Code:

java.lang.NullPointerException
    at forestry.mail.items.ItemLetter$LetterInventory.onGuiSaved(ItemLetter.java:55)
    at forestry.core.gui.ContainerItemInventory.saveInventory(ContainerItemInventory.java:76)
    at forestry.core.gui.ContainerItemInventory.func_75134_a(ContainerItemInventory.java:86)
    at forestry.mail.gui.ContainerLetter.func_75134_a(ContainerLetter.java:88)
    at net.minecraft.entity.player.EntityPlayer.func_70106_y(EntityPlayer.java:1548)
    at net.minecraft.world.World.func_72900_e(World.java:1882)
    at net.minecraft.server.management.ServerConfigurationManager.disconnect(ServerConfigurationManager.java:399)
    at net.minecraft.network.NetServerHandler.func_72565_c(NetServerHandler.java:286)
    at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:65)
    at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(SourceFile:30)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:847)
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:320)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:716)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:600)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)

Кто знает что делать в этом случае?

 

Пробовал forge и forestry обновлять?