[02:22:09] [Server thread/WARN]: Unknown target reason, please report on the issue tracker
java.lang.Exception: null
at net.minecraft.entity.EntityLiving.setGoalTarget(EntityLiving.java:193) [vq.class:?]
at net.minecraft.entity.monster.EntityEnderman.setGoalTarget(EntityEnderman.java:107) [acu.class:?]
at net.minecraft.entity.monster.EntityEnderman.func_70624_b(EntityEnderman.java:102) [acu.class:?]
at mods.flammpfeil.slashblade.ability.Taunt.fire(Taunt.java:61) [Taunt.class:?]
at mods.flammpfeil.slashblade.item.ItemSlashBlade.func_77663_a(ItemSlashBlade.java:2082) [ItemSlashBlade.class:?]
at net.minecraft.item.ItemStack.func_77945_a(ItemStack.java:591) [aip.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_70429_k(InventoryPlayer.java:426) [aec.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:527) [aed.class:?]
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2502) [vp.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:249) [aed.class:?]
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:467) [oq.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_73660_a(NetHandlerPlayServer.java:246) [pa.class:?]
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:209) [NetworkDispatcher$1.class:git-1.12.2-cba3be8]
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:235) [gw.class:?]
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:197) [oz.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:965) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:474) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:806) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:660) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_212]