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When I open my server with mods 1.15.2 I get this error:


---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 21-03-20 0:14
Description: Exception in server tick loop

net.minecraftforge.fml.LoadingFailedException: Loading errors encountered: [
    Vulcanite (vulcanite) encountered an error during the common_setup event phase
§7Attempted to load class net/minecraft/client/world/ClientWorld for invalid dist DEDICATED_SERVER
    at net.minecraftforge.fml.ModLoader.dispatchAndHandleError(ModLoader.java:201) ~[?:?] {re:classloading}
    at net.minecraftforge.fml.ModLoader.loadMods(ModLoader.java:154) ~[?:?] {re:classloading}
    at net.minecraftforge.fml.server.ServerModLoader.begin(ServerModLoader.java:46) ~[?:?] {re:classloading}
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:122) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:613) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_221] {}

A detailed walkthrough of the error, its code path and all known details is as follows:

-- System Details --
    Minecraft Version: 1.15.2
    Minecraft Version ID: 1.15.2
    Operating System: Windows 7 (amd64) version 6.1
    Java Version: 1.8.0_221, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 732306400 bytes (698 MB) / 2080374784 bytes (1984 MB) up to 4752146432 bytes (4532 MB)
    CPUs: 8
    JVM Flags: 0 total; 
    ModLauncher: 5.0.0-milestone.4+67+b1a340b
    ModLauncher launch target: fmlserver
    ModLauncher naming: srg
    ModLauncher services: 
        /eventbus-2.0.0-milestone.1-service.jar eventbus PLUGINSERVICE 
        /forge-1.15.2-31.1.24.jar object_holder_definalize PLUGINSERVICE 
        /forge-1.15.2-31.1.24.jar runtime_enum_extender PLUGINSERVICE 
        /accesstransformers-2.0.4-shadowed.jar accesstransformer PLUGINSERVICE 
        /forge-1.15.2-31.1.24.jar capability_inject_definalize PLUGINSERVICE 
        /forge-1.15.2-31.1.24.jar runtimedistcleaner PLUGINSERVICE 
        /forge-1.15.2-31.1.24.jar fml TRANSFORMATIONSERVICE 
        /MixinBootstrap-1.0.2.jar mixinbootstrap TRANSFORMATIONSERVICE 
        /MixinBootstrap-1.0.2.jar mixin PLUGINSERVICE 
        /MixinBootstrap-1.0.2.jar mixinbootstrap PLUGINSERVICE 
    FML: 31.1
    Forge: net.minecraftforge:31.1.24
    FML Language Providers: 
        [email protected]
    Mod List: 
        forge-1.15.2-31.1.24-server.jar Minecraft {[email protected] SIDED_SETUP}
        mcw-bridges-1.0.3-mc1.15.2.jar Macaw's Bridges {[email protected] SIDED_SETUP}
        followingvillagers-1.15.2-1.4.0.jar Following Villagers {[email protected] SIDED_SETUP}
        vanillahammers-1.15.1-1.0.jar Vanilla Hammers {[email protected] SIDED_SETUP}
        guardvillagers-1.15.2-1.0.2.jar Guard Villagers {[email protected] SIDED_SETUP}
        mining-helmet-1.15.2-1.0.7.jar Mining Helmet {[email protected] SIDED_SETUP}
        vanillaexcavators-1.15.1-1.0.jar Vanilla Excavators {[email protected] SIDED_SETUP}
        curiouselytra-FORGE-1.15.2-2.0.jar Curious Elytra {[email protected] SIDED_SETUP}
        SnowRealMagic-1.15.2-1.7.2.jar Snow! Real Magic! {[email protected] SIDED_SETUP}
        simplybackpacks-1.15.2-1.4.1.jar Simply Backpacks {[email protected] SIDED_SETUP}
        caelus-FORGE-1.15.2-2.0-beta1.jar Caelus API {[email protected] SIDED_SETUP}
        forge-1.15.2-31.1.24-universal.jar Forge {[email protected] SIDED_SETUP}
        Aquaculture-1.15.2-2.0.11.jar Aquaculture 2 {[email protected] SIDED_SETUP}
        MiscAdditions-1.2.1.jar Misc Additions {[email protected] SIDED_SETUP}
        extragolems-10.1.0.jar Extra Golems {[email protected] SIDED_SETUP}
        Vulcanite-2.0.2-mc1.15.2.jar Vulcanite {[email protected] ERROR}
        curios-FORGE-1.15.2-2.0.1.jar Curios API {[email protected] SIDED_SETUP}
        levelhearts-1.15.1-2.1.0.jar LevelHearts {[email protected] SIDED_SETUP}
        FruitTrees-1.15.2-1.1.6.jar Fruit Trees {[email protected] SIDED_SETUP}
        Kiwi-1.15.2-2.6.5.jar Kiwi {[email protected] SIDED_SETUP}
    Kiwi Modules: 
    Data Packs: 
    Is Modded: Definitely; Server brand changed to 'forge'
    Type: Dedicated Server (map_server.txt)


Forge Version: 1.15.2-forge-31.1.24

I have these mods:


1. AquaCulture

2. Mutant Beasts

3. Simply Backpacks

4. Vanilla Excavators

5. Vanilla Hammers

6. Fruit Trees

7. LLibrary Kiwi

8. LLibrary Mixin

9. Vulcanite

10. Level Hearts

11. Misc Additions

12. Curious Elytra

13. LLibrary Caelus API

14. LLibrary Curios API

15. Guard Villages

16. Following Villagers

17. Miner's Helmet

18. Macaw's Bridges

19. Extra Golems

20. Snow! Real Magic!

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Remove Vulcanite

This is my Forum Signature, I am currently attempting to transform it into a small guide for fixing easier issues using spoiler blocks to keep things tidy.


As the most common issue I feel I should put this outside the main bulk:

The only official source for Forge is https://files.minecraftforge.net, and the only site I trust for getting mods is CurseForge.

If you use any site other than these, please take a look at the StopModReposts project and install their browser extension, I would also advise running a virus scan.


For players asking for assistance with Forge please expand the spoiler below and read the appropriate section(s) in its/their entirety.


Logs (Most issues require logs to diagnose):


Please post logs using one of the following sites (Thank you Lumber Wizard for the list):

https://gist.github.com/100MB Requires member (Free)

https://pastebin.com/: 512KB as guest, 10MB as Pro ($$$)

https://hastebin.com/: 400KB

Do NOT use sites like Mediafire, Dropbox, OneDrive, Google Drive, or a site that has a countdown before offering downloads.


What to provide:

...for Crashes and Runtime issues:

Minecraft 1.14.4 and newer:

Post debug.log

Older versions:

Please update...


...for Installer Issues:

Post your installer log, found in the same place you ran the installer

This log will be called either installer.log or named the same as the installer but with .log on the end

Note for Windows users:

Windows hides file extensions by default so the installer may appear without the .jar extension then when the .log is added the log will appear with the .jar extension


Where to get it:

Mojang Launcher: When using the Mojang launcher debug.log is found in .minecraft\logs.


Curse/Overwolf: If you are using the Curse Launcher, their configurations break Forge's log settings, fortunately there is an easier workaround than I originally thought, this works even with Curse's installation of the Minecraft launcher as long as it is not launched THROUGH Twitch:

  1. Make sure you have the correct version of Forge installed (some packs are heavily dependent on one specific build of Forge)
  2. Make a launcher profile targeting this version of Forge.
  3. Set the launcher profile's GameDir property to the pack's instance folder (not the instances folder, the folder that has the pack's name on it).
  4. Now launch the pack through that profile and follow the "Mojang Launcher" instructions above.






or alternately, 


Fallback ("No logs are generated"):

If you don't see logs generated in the usual place, provide the launcher_log.txt from .minecraft


Server Not Starting:


If your server does not start or a command window appears and immediately goes away, run the jar manually and provide the output.


Reporting Illegal/Inappropriate Adfocus Ads:


Get a screenshot of the URL bar or copy/paste the whole URL into a thread on the General Discussion board with a description of the Ad.

Lex will need the Ad ID contained in that URL to report it to Adfocus' support team.


Posting your mod as a GitHub Repo:


When you have an issue with your mod the most helpful thing you can do when asking for help is to provide your code to those helping you. The most convenient way to do this is via GitHub or another source control hub.

When setting up a GitHub Repo it might seem easy to just upload everything, however this method has the potential for mistakes that could lead to trouble later on, it is recommended to use a Git client or to get comfortable with the Git command line. The following instructions will use the Git Command Line and as such they assume you already have it installed and that you have created a repository.


  1. Open a command prompt (CMD, Powershell, Terminal, etc).
  2. Navigate to the folder you extracted Forge’s MDK to (the one that had all the licenses in).
  3. Run the following commands:
    1. git init
    2. git remote add origin [Your Repository's URL]
      • In the case of GitHub it should look like: https://GitHub.com/[Your Username]/[Repo Name].git
    3. git fetch
    4. git checkout --track origin/master
    5. git stage *
    6. git commit -m "[Your commit message]"
    7. git push
  4. Navigate to GitHub and you should now see most of the files.
    • note that it is intentional that some are not synced with GitHub and this is done with the (hidden) .gitignore file that Forge’s MDK has provided (hence the strictness on which folder git init is run from)
  5. Now you can share your GitHub link with those who you are asking for help.

[Workaround line, please ignore]


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