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How was Forge installed, some research turned up similar cases where the issue was missing libraries

From the Rules Thread:

 

Below is a list of things which you MUST include in your post.

• Be sure to include the entire logs/fml-{client/server}-latest.log found in your .minecraft folder / server root folder. Not including the log in no way helps us to help you and has a small chance of getting you banned.
• State what research you have already done (You should have done some, this forum is only for well-researched bugs!).
• Use the spoilers to enclose stack traces and other long information: 
• Do not attach your logs to your post or use file-uploading services like Dropbox. Use Pastebin or Github Gists.
• In general give as much information as you can. "It does not work", "I get a black Screen", etc. in no way helps us to help you and will only cause you to get in trouble. 

Try moving it somewhere that isn't under \Users\ and trying again, the C drive sometimes gums things up with folder permissions

What's your Java version? Quick reminder that Forge requires Java 8, not 7 and not 9.

Quick google search with your error turned this up: https://github.com/spring-projects/spring-boot/issues/7565 not exactly the same but it mentions Java 9 and this may be your issue.

2 hours ago, yololeft2005 said:

But I have the minecraft from a luncher that a friend sent me.

Please elaborate on this... did you get Minecraft from Minecraft.net?

Bungee is Spigot, not Forge. Sponge is not Forge. If they are "necessary" then you'll need to prove this is a forge issue and not an issue with either of them.

We'll need logs to really help you in any way, as noted in the stickied thread:

Quote

Below is a list of things which you MUST include in your post.

• Be sure to include the entire logs/fml-{client/server}-latest.log found in your .minecraft folder / server root folder. Not including the log in no way helps us to help you and has a small chance of getting you banned.
• State what research you have already done (You should have done some, this forum is only for well-researched bugs!).
• Use the spoilers to enclose stack traces and other long information: 
• Do not attach your logs to your post or use file-uploading services like Dropbox. Use Pastebin or Github Gists.
• In general give as much information as you can. "It does not work", "I get a black Screen", etc. in no way helps us to help you and will only cause you to get in trouble. 

 

• THIS IS A SUPPORT FORUM FOR FML/FORGE, AND ONLY FML/FORGE. Go to a mod specific forum (whether on this site or another) to ask for help with a certain mod. If you are using MCPC+/Cauldron or any other Bukkit-API server software, do not post here, post in their forums. For help with Sponge, go here.

As stated in: 

 

Note that when you use the Forge installer with the vanilla launcher it creates a new Launcher profile that must be selected.

If that is not the case please tell us how you installed Forge and how you are launching the game, with a log from the installer if possible.

Going to need logs as described in: 

 

 

Jam what? I'm not familiar with this.

I would not recommend messing with the arguments directly unless you know what you're doing.

Just use a launcher, they're there for a reason.

Client or Server?

 

If it's a client the answer will vary depending on which launcher you are using, google is your friend in this case.

Note that Clients almost always handle this for you.

 

If it's a server that is through the use of two command line switches: -Xmx for max and -Xms for minimum, the form for both is <switch><number><denomination (M for megs or G for Gigs)>

First, do you have Optifine installed?

Second, you're only giving it a single gigabyte, I'd recommend 3-4G depending on how heavy the mods are, but even Vanilla would need at least 2G. This is not the primary issue here but is likely to cause problems later on.

Third, your hardware specs seem a bit lacking to me, unlikely to crash you but don't expect stellar performance.

The one you have now is actually invalid, I goofed when I pasted the json earlier, you need a comma before promos (my code block has been edited to reflect this)

 

I recommend getting a text editor like VisualStudio Code, SublimeText, or Notepad++, something that will check if what you have is valid json

Bingo 

[22:10:40] [Forge Version Check/INFO] [forge.VersionCheck]: [screenshotuploader] Starting version check at http://localhost/VersionTest.json

[22:10:40] [Forge Version Check/INFO] [forge.VersionCheck]: [screenshotuploader] Found status: OUTDATED Target: 1.1.2

You appear to be missing a few sections, I'm not sure these are crucial but they may be, try this:

{
  "homepage": "http://darkeyedragon.me/mods",
  "1.12.2":{
    "1.1.3":"<Changelog here, try to do this for every version>"
  }
  "promos": {
    "1.12.2-latest": "1.1.3",
    "1.12.2-recommended": "1.1.2",
    "latest": "1.1.3",
    "recommended": "1.1.2"
  }
}

 

You need to key in the dependency versions manually, they don't get filled when the script runs

I'm still new to this myself, just took another look and you seem to have only taken one bit of their file, I suspect you will need this section and make sure you have the corresponding values in your properties file.

That doesn’t look like a full log to me, which one is that?

That is beyond my knowledge. Give the thread some time and someone more knowledgeable than me might wander in.

It is automatically read by forge and/or minecraft itself and used to translate text strings to the proper language, I can't say I have extensive experience with this but I'm fairly sure if you're trying to hot-edit your .lang you're doing something wrong.

It should work as far back as when pack format 3 became a thing (I do not know the exact version). Any further back and you'll need to stick with en_US.lang.

If you don't have a pack.mcmeta file, create it with the following contents and put it in src/main/resources:
 

{
  "pack": {
    "pack_format": 3,
    "description": "Resources for <Your Mod name> mod"
  }
}

The ["pack_format":3] bit is what will make it work all lowercase

Not showing the full path on the buttons is through your .lang file with the full path as the key.

As for the 2D Array I don't think that is possible, and from what I'm seeing can't be added without modifying forge code, why would there need to be more than one login anyway? Two strings should serve you fine.

 

Edit: Also I just noticed where this thread is, this has nothing to do with ForgeGradle and is thus in the wrong place.

Seems I was wrong about calling it in preInit, from forge inline docs: 

Note, that this method is being called by the {@link FMLModContaier}, so the mod needn't call it in init().

Oh well, live and learn