DaemonUmbra

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

Really old Minecraft versions are 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.

Forge is not compatible with Java 15 as a library Forge uses was removed in Java 15.

Ok, disconnect your gamepad and try again

I don't know, I'm a Windows user, try Google

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

You should be getting the installer, not the universal...

Do you have Java installed?

I've never seen this error before and the only info I have is from some vague hits on Google... I have no idea

Complain to MrCrayfish for not making his client-sided mod safe on servers (Controllable)

I'm not sure their systems are set up for running game servers. From what I could tell this error has something to do with errors between the game and the terminal the game expects to be there.

Yeah, broken versions were removed, update to the latest Forge

TWITCH... that'll be the reason you don't have a debug.log Please refer to my signature for instructions on bypassing Twitch/Overwolf/CurseForge to get a debug.log

Show a screenshot of your logs folder

Is this from a server host or your own hardware?

What happens if you run the jar file manually?

If you're on Windows you'll probably want the MSI, it's an installer.

Can you reproduce it with just neat?

What kind of hardware are you running the server on?

We recommend AdoptOpenJDK around here, make sure you get a 64-bit version of Java 8 HotSpot.

Do you have Optifine installed?

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

Please provide debug.log (more info on where it is and how to provide it in my signature below, just expand the spoiler)