DaemonUmbra

Where are you downloading Forge from? Please give a URL

OTG does this thing where a component of it is extracted to a 1.12.2 folder in your mods folder. The annoying thing about this is that component depends back on the code of the main part of the mod, so when you remove the main part of the mod that you can see, the extracted part in /mods/1.12.2/ that hasn't done anything to say "I'm in here!" crashes your game.

Please provide your debug.log and a screenshot of your mods folder showing the address bar

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

There's nothing stopping you from making a new Forge profile.

Open the pack's mod list in Twitch, click the gear. Repair Profile should be one of the options that shows

Try repairing the instance, it sounds like Twitch is screwing up Forge's install process

That looks like latest.log, I'm asking for debug.log

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

Click the package explorer and press F5 or right click package explorer and click refresh

Please don't Necro old threads, if you have an issue make your own.

Does it not show a screen saying this?

So you're asking how to un-overwrite a world save that you didn't back up?

I wouldn't put it past aternos to be killing the server when it actually becomes a significant load.

I've seen this before when two mods pack in two different versions of Mixin, only one can exist at a time and when the one with an older version loads first and the second one requires a newer version of Mixin than the first one is packing, kaboom.

Remove FastFurnace

This is not going to happen, locking

1.7.10 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

This error indicates you are running the server with Java 9 or later. Even if you had Java 8 installed and got this error it means that Java 8 installation is not the installation your PC is attempting to use. The fix for this is either remove all other Java installations, or Fully qualify the java invocation by specifying the full path to the java exe

Can you provide debug.log please?

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

Please provide debug.log

Check my signature for info and links on where to find logs

Do you have anything else running? Chrome is known to be a bit of a hog