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So many problems while creating Modpack on 1.15.1


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Hey, My name is Alex, I just switched my email and made a new account so I could change my name (Old name was EnderBoy898). I have been trying to put together A 1.15.1 Modpack for me and my friends to play on but I keep running into SO MANY BUGS. Just when I think I have it working it ends up crashing or freezing again. My current problem has been causing me so much trouble that I just want to pull all my hair out. I can't tell if it's a Mod Conflict, a Broken Mod, or just Forge being broken. 

I started up the server and noticed there were a bunch of errors in console about loot tables and other stuff like recipes, I knew immediately I was going to run into issues so I loaded up the client, logged into the server and checked the nearest Minecart chest and there was NO LOOT AT ALL (keep in mind this was a brand new world). I teleported all the Chest Minecarts to me and checked them all...still nothing. After I realized that everything was broken I started to notice even more was broken. I open up my inventory and find JEI is not even working. I thought maybe I forgot to add it to the mods and so I check but there it is. About 5 minutes after I found those two bugs the whole server randomly froze up. Mobs stopped moving, chunks stopped rendering, blocks wouldn't drop tiles, and then it kicked me saying "Timed Out". The server never put out a crash report or anything that shows what went wrong, it just freezes until I forcibly close it. I removed three structure generation mods Ruins, Dungeon Crawl, and Valhelsia Structures and started up the server again to see if it worked without those mods and I noticed that JEI was working but Loot tables were still messed up and shortly after the whole server crashed but luckily this time there was a crash report (although there might not be much in the crash report, it only was generated because the server took 60 seconds for 1 tick)

Now hear me out, I know that it's stupid of me to create a Modpack on a beta version of Forge using a bunch of Beta Mods but I think it's a good thing I am doing this. It helps everyone out because I am finding so many bugs, conflicts and more. I have already reached out to more than five different devs about their mods crashing the server on startup but I can't even do that now because I can't find which mod is causing the issues to begin with. I need help figuring out WHICH MOD IS THE ISSUE for both the Loot Table bug and the World Freezing Up bug (All these issues happen on Singleplayer and Multiplayer). If someone could read the log and try and single out one or more mods as the cause that would be amazing. 

I will be posting the server logs, crash report, config, list of mods and the ZIP file for installing this mod on the TWITCH LAUNCHER (in case one of you wants to load it up and try yourself. Sometimes it takes a while for the world to freeze but it will happen. I can provide more info if need be and I won't be touching the files until I get a response from someone.

Minecraft Version: 1.15.1
Forge Version: 1.15.1 - 30.0.41


Thank you for reading this and possibly helping me out.


p.s. I got an error when uploading that 1mb file and it said "< 200" which is confusing. Just in case the file doesn't upload here is a link to the same file on Mediafire

Edited by LunarCama
Changed title and Added a bit of helpful info
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For a start, remove Ores Above Diamonds, as they seem to have a broken json.

For future reference just supply the debug.log using a paste site until you're asked for more

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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21 hours ago, DaemonUmbra said:

For a start, remove Ores Above Diamonds, as they seem to have a broken json.

For future reference just supply the debug.log using a paste site until you're asked for more

I removed OresAboveDiamonds and I also removed AdditionalEvents because it said something about loot tables and I thought that might fix my problem (No longer does the console output Loot Table errors). I had to remove two other mods that used AdditionalEvents (LavaBaubles and UnstableTools) and after that, the server was starting up but I ran into another issue I forgot to mention. Sometimes when generating a new world it will freeze at 97% or somewhere near that which makes me think it might be some sort of generated ore or structure that is causing the crash. It happens sometimes but not every time. I provided the debug logs, hopefully you can figure it out because I can't lol.

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