Right, so. I had a mod idea and decided this may be a nice way to boost my knowledge of java; step one install forge. I ran the official and latest 1.12.2 installer from files.minecraftforge.net, and it completed the installation. I now have a forge 1.12.2 version and inside the version folder is a .json file. However, when I attempt to launch the game, I get the "unexpected issue occurred" error and it stops instantly. At no point does a game window open. My latest log file is completely empty aside from this:
[16:49:35] [Client thread/INFO]: Setting user: #manually removed username#
[16:49:36] [Client thread/INFO]: LWJGL Version: 2.9.4
[16:49:37] [Client thread/INFO]: Reloading ResourceManager: Default
[16:49:37] [Sound Library Loader/INFO]: Starting up SoundSystem...
[16:49:38] [Thread-2/INFO]: Initializing LWJGL OpenAL
[16:49:38] [Thread-2/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[16:49:38] [Thread-2/INFO]: OpenAL initialized.
[16:49:38] [Sound Library Loader/INFO]: Sound engine started
[16:49:39] [Client thread/INFO]: Created: 1024x512 textures-atlas
[16:49:40] [Client thread/INFO]: Narrator library successfully loaded
[17:02:14] [Client thread/INFO]: Stopping!
[17:02:14] [Client thread/INFO]: SoundSystem shutting down...
[17:02:14] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
As far as I can tell there is no error, other than "Stopping!", which is of course is why I came here.
I am using Linux mint 19.1 Tessa and the official game/launcher.
Sorry if I have posted this wrong, I'm not used to forum interfaces.