Issue Description:

I installed the EnderIO modules for the mods i put into my modpack client- and server-sided. In Singleplayer everything works fine. But when me and my friends try to join the server, this error occurs:

I think the problem could be that i have to install other versions of the modules on the server-side.
Could that be the case? And if yes, where would i find these?

What happens:

As i said above, we are not able to join the server.

What you expected to happen:

Being able to join the server and play.

---

Affected Versions (Do not use "latest"):

• EnderIO: 5.2.66
• EnderCore: 0.5.76
• Minecraft: 1.12.2
• Forge: 1.12.2-14.23.5.2854
• SpongeForge? no
• Optifine? no
• Server

Your most recent log file where the issue was present:

[00:44:10] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLServerTweaker
[00:44:10] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLServerTweaker
[00:44:10] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLServerTweaker
[00:44:10] [main/INFO] [FML]: Forge Mod Loader version 14.23.5.2847 for Minecraft 1.12.2 loading
[00:44:10] [main/INFO] [FML]: Java is OpenJDK 64-Bit Server VM, version 1.8.0_272, running on Linux:amd64:5.5.15-200.fc31.x86_64, installed at /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.272.b10-0.fc31.x86_64/jre
[00:44:11] [main/WARN] [FML]: The coremod FMLCorePlugin (net.minecraftforge.fml.relauncher.FMLCorePlugin) is not signed!
[00:44:11] [main/WARN] [FML]: The coremod FMLForgePlugin (net.minecraftforge.classloading.FMLForgePlugin) is not signed!
[00:44:11] [main/INFO] [FML]: Searching /mnt/minecraftotherpacks/./mods for mods
[00:44:11] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[00:44:11] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[00:44:11] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[00:44:11] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[00:44:11] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[00:44:13] [main/ERROR] [FML]: FML appears to be missing any signature data. This is not a good thing
[00:44:13] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[00:44:13] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[00:44:13] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[00:44:13] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[00:44:15] [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.server.MinecraftServer}
[00:44:22] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Starting minecraft server version 1.12.2
[00:44:22] [Server thread/INFO] [FML]: MinecraftForge v14.23.5.2847 Initialized
[00:44:22] [Server thread/INFO] [FML]: Starts to replace vanilla recipe ingredients with ore ingredients.
[00:44:22] [Server thread/INFO] [FML]: Invalid recipe found with multiple oredict ingredients in the same ingredient...
[00:44:22] [Server thread/INFO] [FML]: Replaced 1227 ore ingredients
[00:44:23] [Server thread/INFO] [FML]: Searching /mnt/minecraftotherpacks/./mods for mods
[00:44:23] [Server thread/INFO] [FML]: Forge Mod Loader has identified 4 mods to load
[00:44:23] [Server thread/WARN] [FML]: Missing English translation for FML: assets/fml/lang/en_us.lang
[00:44:23] [Server thread/INFO] [FML]: Attempting connection with missing mods [minecraft, mcp, FML, forge] at CLIENT
[00:44:23] [Server thread/INFO] [FML]: Attempting connection with missing mods [minecraft, mcp, FML, forge] at SERVER
[00:44:24] [Server thread/INFO] [FML]: Processing ObjectHolder annotations
[00:44:24] [Server thread/INFO] [FML]: Found 1169 ObjectHolder annotations
[00:44:24] [Server thread/INFO] [FML]: Identifying ItemStackHolder annotations
[00:44:24] [Server thread/INFO] [FML]: Found 0 ItemStackHolder annotations
[00:44:24] [Server thread/INFO] [FML]: Configured a dormant chunk cache size of 0
[00:44:24] [Forge Version Check/INFO] [forge.VersionCheck]: [forge] Starting version check at http://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json
[00:44:24] [Server thread/INFO] [FML]: Applying holder lookups
[00:44:24] [Server thread/INFO] [FML]: Holder lookups applied
[00:44:24] [Server thread/INFO] [FML]: Applying holder lookups
[00:44:24] [Server thread/INFO] [FML]: Holder lookups applied
[00:44:24] [Server thread/INFO] [FML]: Applying holder lookups
[00:44:24] [Server thread/INFO] [FML]: Holder lookups applied
[00:44:24] [Server thread/INFO] [FML]: Applying holder lookups
[00:44:24] [Server thread/INFO] [FML]: Holder lookups applied
[00:44:24] [Server thread/INFO] [FML]: Injecting itemstacks
[00:44:24] [Server thread/INFO] [FML]: Itemstack injection complete
[00:44:24] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Loading properties
[00:44:24] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Default game type: SURVIVAL
[00:44:24] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Generating keypair
[00:44:24] [Forge Version Check/INFO] [forge.VersionCheck]: [forge] Found status: OUTDATED Target: 14.23.5.2854
[00:44:24] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Starting Minecraft server on 5.83.172.151:10420
[00:44:25] [Server thread/INFO] [net.minecraft.network.NetworkSystem]: Using epoll channel type
[00:44:25] [Server thread/INFO] [FML]: Applying holder lookups
[00:44:25] [Server thread/INFO] [FML]: Holder lookups applied
[00:44:25] [Server thread/INFO] [FML]: Injecting itemstacks
[00:44:25] [Server thread/INFO] [FML]: Itemstack injection complete
[00:44:25] [Server thread/INFO] [FML]: Forge Mod Loader has successfully loaded 4 mods
[00:44:25] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Preparing level "world"
[00:44:25] [Server thread/INFO] [FML]: Injecting existing registry data into this server instance
[00:44:25] [Server thread/INFO] [FML]: Applying holder lookups
[00:44:25] [Server thread/INFO] [FML]: Holder lookups applied
[00:44:25] [Server thread/INFO] [FML]: Loading dimension 0 (world) (net.minecraft.server.dedicated.DedicatedServer@4f5a1e27)
[00:44:26] [Server thread/INFO] [net.minecraft.advancements.AdvancementList]: Loaded 488 advancements
[00:44:26] [Server thread/INFO] [FML]: Loading dimension -1 (world) (net.minecraft.server.dedicated.DedicatedServer@4f5a1e27)
[00:44:26] [Server thread/INFO] [FML]: Loading dimension 1 (world) (net.minecraft.server.dedicated.DedicatedServer@4f5a1e27)
[00:44:26] [Server thread/INFO] [net.minecraft.server.MinecraftServer]: Preparing start region for level 0
[00:44:27] [Server thread/INFO] [net.minecraft.server.MinecraftServer]: Preparing spawn area: 28%
[00:44:28] [Server thread/INFO] [net.minecraft.server.MinecraftServer]: Preparing spawn area: 91%
[00:44:28] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Done (3.446s)! For help, type "help" or "?"
[00:44:28] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Starting GS4 status listener
[00:44:28] [Query Listener #1/INFO] [net.minecraft.server.MinecraftServer]: Query running on 5.83.172.151:10420
[00:44:29] [Server thread/INFO] [FML]: Unloading dimension -1
[00:44:29] [Server thread/INFO] [FML]: Unloading dimension 1
[00:47:12] [User Authenticator #1/INFO] [net.minecraft.server.network.NetHandlerLoginServer]: UUID of player Priletta is 33c4151c-de8c-49e5-9568-485ee5aebdb9
[00:47:12] [Netty Epoll Server IO #6/INFO] [FML]: Client protocol version 2
[00:47:12] [Netty Epoll Server IO #6/INFO] [FML]: Client attempting to join with 126 mods : [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],appliedenergistics2@rv6-stable-7,[email protected],[email protected],[email protected]+release.109.220f184,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],opencomputers|[email protected],[email protected],[email protected],[email protected],[email protected]
[00:47:13] [Server thread/INFO] [net.minecraft.network.NetHandlerPlayServer]: Priletta lost connection: Disconnected
[00:47:13] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Priletta left the game
[00:47:22] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Saving...
[00:47:22] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Saved the world
[00:59:48] [User Authenticator #2/INFO] [net.minecraft.server.network.NetHandlerLoginServer]: UUID of player Priletta is 33c4151c-de8c-49e5-9568-485ee5aebdb9
[00:59:48] [Netty Epoll Server IO #22/INFO] [FML]: Client protocol version 2
[00:59:48] [Netty Epoll Server IO #22/INFO] [FML]: Client attempting to join with 126 mods : [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],appliedenergistics2@rv6-stable-7,[email protected],[email protected],[email protected]+release.109.220f184,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],opencomputers|[email protected],[email protected],[email protected],[email protected],[email protected]
[00:59:48] [Server thread/INFO] [net.minecraft.network.NetHandlerPlayServer]: Priletta lost connection: Disconnected
[00:59:48] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Priletta left the game
[01:02:28] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Saving...
[01:02:28] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Saved the world

I tried to connect the last time in line 80-84 (the last few lines).

You don't have a single mod installed on your server, just Forge. Mods need to be installed on the client AND the server.

PS: The line "[00:44:23] [Server thread/INFO] [FML]: Attempting connection with missing mods [minecraft, mcp, FML, forge] at SERVER" shows which mods you have installed. (What Forge is doing here is faking a connection without the installed mods to see if it can accept vanilla clients.)