DaemonUmbra

I'm afraid the amount of coremods installed makes it difficult to determine who's at fault, if it's even possible to do so. Please provide your debug.log as described in the EAQ and the logs section of my signature below and I'll see if I can give you any more information. Note that this may not be possible due the aforementioned amount of coremods.

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Where are you downloading Forge from? Please give a URL

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Please provide your debug.log as described in the EAQ and the logs section of my signature below.

The fact that 1.12.2 is no longer supported doesn't mean that the servers are sabotaged. You've got a separate issue to work out and 1.12.2 being out of support means we're not going to help you. The other arguments about how 1.12.2 should still be supported, all of those things have been said about previous versions and they will be said of the next version that people refuse to update from.

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Please provide your debug.log as described in the EAQ and the Logs section of my signature below

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

How about you explain what you need to do

1.12 is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Try the most recent version of Forge, this was fixed last night

The names of almost all of your mods indicates you got them from repost sites. https://stopmodreposts.org Also this bug was just fixed last night, try the most recent version of Forge

So what's happened here is something in the installer is failing and rather than fix that issue you'd rather just circumvent the installer entirely

Please provide your installer log and stop asking people to redistribute files to you

I did not ask if you were missing that library... I asked what is telling you that? Are you looking for it just for kicks?

This is not a yes/no question

What is telling you that this library is missing?

https://minecraft.gamepedia.com/Minecraft_launcher#Installations

Crap, sorry I'm hopping between threads and lost where I was ?‍♂️ Anyway, still you should use Twitch for installing the mods and then the method shown in the video to run the game.

Please don't hijack other people's threads. If you have an issue please make your own thread.