Minecraft version & Mod Version: Minecraft 1.12.2
Modpack Roguelike Adventures and Dungeons 1.34a

Single player or Server: Server

Describe problem (what you were doing / what happened):
While looking at the log file due to a different and unrelated issue, I noticed the console log had been spammed by a repeating error. Upon investigation, it noticed that the error was being thrown because of an issue with Simple Storage Network and The Eight Fabled Blades. No crash report is generated, however the issue is causing the latest.log file for the session to grow in excess of 2 GB in file size. The error in question first appears at 22:18:39 in file 2019-12-04-2.log.001.txt Uploading of the file directly to Github is not possible as the Log file was split into 200 mb pieces using HJSplit to make the file openable with NotePad++, and a smaller file size was not selected as using the maximum file size for Github would have resulted in 24-26 individual files. The complete log is hosted online at the link below.

Crash log (if any): https://mega.nz/#F!BRIECQQa!ON2NXDOk_QH-OsGdtvRFFw

(If this is a suggestion and not a bug report, delete all this and just write your suggestion!)

The related exception as mentioned at the timestamp

[22:18:39] [Server thread/ERROR] [FML]: FMLIndexedMessageCodec exception caught java.lang.RuntimeException: Missing at net.minecraftforge.fml.server.FMLServerHandler.getClientToServerNetworkManager(FMLServerHandler.java:299) ~[FMLServerHandler.class:?] at net.minecraftforge.fml.common.FMLCommonHandler.getClientToServerNetworkManager(FMLCommonHandler.java:555) ~[FMLCommonHandler.class:?] at net.minecraftforge.fml.common.network.FMLOutboundHandler$OutboundTarget$10.selectNetworks(FMLOutboundHandler.java:329) ~[FMLOutboundHandler$OutboundTarget$10.class:?] at net.minecraftforge.fml.common.network.FMLOutboundHandler.write(FMLOutboundHandler.java:378) ~[FMLOutboundHandler.class:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:730) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:816) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:723) ~[minecraft_server.1.12.2.jar:?] at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:111) ~[minecraft_server.1.12.2.jar:?] at io.netty.handler.codec.MessageToMessageCodec.write(MessageToMessageCodec.java:116) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:801) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1032) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:296) ~[minecraft_server.1.12.2.jar:?] at net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper.sendToServer(SimpleNetworkWrapper.java:321) [SimpleNetworkWrapper.class:?] at com.Shultrea.Rin.theeightfabledblades.swords.SwordLunarEdge.onUpdate(SwordLunarEdge.java:180) [SwordLunarEdge.class:?] at net.minecraft.item.ItemStack.updateAnimation(ItemStack.java:526) [aip.class:?] at net.minecraft.entity.player.InventoryPlayer.decrementAnimations(InventoryPlayer.java:363) [aec.class:?] at net.minecraft.entity.player.EntityPlayer.onLivingUpdate(EntityPlayer.java:511) [aed.class:?] at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2179) [vp.class:?] at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:234) [aed.class:?] at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:382) [oq.class:?] at net.minecraft.network.NetHandlerPlayServer.update(NetHandlerPlayServer.java:173) [pa.class:?] at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:209) [NetworkDispatcher$1.class:?] at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:285) [gw.class:?] at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:180) [oz.class:?] at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:790) [MinecraftServer.class:?] at net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities(DedicatedServer.java:397) [nz.class:?] at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:668) [MinecraftServer.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222] [22:18:39] [Server thread/ERROR] [FML]: SimpleChannelHandlerWrapper exception java.lang.RuntimeException: Missing at net.minecraftforge.fml.server.FMLServerHandler.getClientToServerNetworkManager(FMLServerHandler.java:299) ~[FMLServerHandler.class:?] at net.minecraftforge.fml.common.FMLCommonHandler.getClientToServerNetworkManager(FMLCommonHandler.java:555) ~[FMLCommonHandler.class:?] at net.minecraftforge.fml.common.network.FMLOutboundHandler$OutboundTarget$10.selectNetworks(FMLOutboundHandler.java:329) ~[FMLOutboundHandler$OutboundTarget$10.class:?] at net.minecraftforge.fml.common.network.FMLOutboundHandler.write(FMLOutboundHandler.java:378) ~[FMLOutboundHandler.class:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:730) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:816) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:723) ~[minecraft_server.1.12.2.jar:?] at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:111) ~[minecraft_server.1.12.2.jar:?] at io.netty.handler.codec.MessageToMessageCodec.write(MessageToMessageCodec.java:116) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:801) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1032) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:296) ~[minecraft_server.1.12.2.jar:?] at net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper.sendToServer(SimpleNetworkWrapper.java:321) [SimpleNetworkWrapper.class:?] at com.Shultrea.Rin.theeightfabledblades.swords.SwordLunarEdge.onUpdate(SwordLunarEdge.java:180) [SwordLunarEdge.class:?] at net.minecraft.item.ItemStack.updateAnimation(ItemStack.java:526) [aip.class:?] at net.minecraft.entity.player.InventoryPlayer.decrementAnimations(InventoryPlayer.java:363) [aec.class:?] at net.minecraft.entity.player.EntityPlayer.onLivingUpdate(EntityPlayer.java:511) [aed.class:?] at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2179) [vp.class:?] at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:234) [aed.class:?] at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:382) [oq.class:?] at net.minecraft.network.NetHandlerPlayServer.update(NetHandlerPlayServer.java:173) [pa.class:?] at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:209) [NetworkDispatcher$1.class:?] at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:285) [gw.class:?] at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:180) [oz.class:?] at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:790) [MinecraftServer.class:?] at net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities(DedicatedServer.java:397) [nz.class:?] at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:668) [MinecraftServer.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222] [22:18:39] [Server thread/ERROR] [FML]: SimpleChannelHandlerWrapper exception java.lang.RuntimeException: Missing at net.minecraftforge.fml.server.FMLServerHandler.getClientToServerNetworkManager(FMLServerHandler.java:299) ~[FMLServerHandler.class:?] at net.minecraftforge.fml.common.FMLCommonHandler.getClientToServerNetworkManager(FMLCommonHandler.java:555) ~[FMLCommonHandler.class:?] at net.minecraftforge.fml.common.network.FMLOutboundHandler$OutboundTarget$10.selectNetworks(FMLOutboundHandler.java:329) ~[FMLOutboundHandler$OutboundTarget$10.class:?] at net.minecraftforge.fml.common.network.FMLOutboundHandler.write(FMLOutboundHandler.java:378) ~[FMLOutboundHandler.class:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:730) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:816) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:723) ~[minecraft_server.1.12.2.jar:?] at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:111) ~[minecraft_server.1.12.2.jar:?] at io.netty.handler.codec.MessageToMessageCodec.write(MessageToMessageCodec.java:116) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:801) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1032) ~[minecraft_server.1.12.2.jar:?] at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:296) ~[minecraft_server.1.12.2.jar:?] at net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper.sendToServer(SimpleNetworkWrapper.java:321) [SimpleNetworkWrapper.class:?] at com.Shultrea.Rin.theeightfabledblades.swords.SwordLunarEdge.onUpdate(SwordLunarEdge.java:180) [SwordLunarEdge.class:?] at net.minecraft.item.ItemStack.updateAnimation(ItemStack.java:526) [aip.class:?] at net.minecraft.entity.player.InventoryPlayer.decrementAnimations(InventoryPlayer.java:363) [aec.class:?] at net.minecraft.entity.player.EntityPlayer.onLivingUpdate(EntityPlayer.java:511) [aed.class:?] at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2179) [vp.class:?] at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:234) [aed.class:?] at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:382) [oq.class:?] at net.minecraft.network.NetHandlerPlayServer.update(NetHandlerPlayServer.java:173) [pa.class:?] at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:209) [NetworkDispatcher$1.class:?] at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:285) [gw.class:?] at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:180) [oz.class:?] at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:790) [MinecraftServer.class:?] at net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities(DedicatedServer.java:397) [nz.class:?] at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:668) [MinecraftServer.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222] [22:18:39] [Server thread/ERROR] [FML]: SimpleChannelHandlerWrapper exception java.lang.RuntimeException: Missing at net.minecraftforge.fml.server.FMLServerHandler.getClientToServerNetworkManager(FMLServerHandler.java:299) ~[FMLServerHandler.class:?] at net.minecraftforge.fml.common.FMLCommonHandler.getClientToServerNetworkManager(FMLCommonHandler.java:555) ~[FMLCommonHandler.class:?]

I dont see any mentions of "com.lothrazar.storagenetwork." anywhere in the log.

(note: net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrappe is core to forge and used by basically every mod)

I think this must be the main cause , so it should be reported to the swords mod tracker :)
Good luck

com.Shultrea.Rin.theeightfabledblades.swords.SwordLunarEdge.onUpdate(SwordLunarEdge.java:18