DaemonUmbra

Are you able to access the files site?

Reinstall Java

Check for a 1.15 version of Hwyla and please be aware that mods rarely work across Minecraft versions

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

Ugocraft isn't available on any modern version as far as I can tell, and this sounds a lot a backdoor coremod (among other things).

Please keep this forum in English. Also, we don't support 1.12.2 anymore, sorry.

Dragon are you telling people to backdate to supported versions?

Or you could join the Discord and let the bot do the lookup for you

It sounds like you interrupted a mapping download. Try this in Powershell: Remove-Item -Recurse -Path "$Env:USERPROFILE/.gradle/caches/forge_gradle/maven_downloader/de/oceanlabs/mcp/mcp_snapshot/20200223-1.15.1" This will delete the cached mapping zip (which is apparently corrupted) and its hash.

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

Take a look at the Gradle docs regarding multi-projects

It depends on the errors, when you say you updated Forge did you update Minecraft versions as well?

I would put this down to Twitch being a butt and breaking things. Try repairing the profile

For some reason certain internet providers are flagging the files site as malicious. I was just making sure that this isn't blatantly the case.

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

That explains it. WinRAR is naughty and steals the .jar file extension from Java. Try running this once and then try double clicking the jar.

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

Are you able to access https://files.minecraftforge.net?

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.

Just add the extra sourceSet to the run in your build.gradle

If you insist this persists on supported versions, please do the following: Show logs from a supported version. Shut down the server properly instead of just killing the process.

Who is your internet provider?

Do you have anything adding keys or buttons, like a gamepad, controller, or joystick? If so, try unplugging it/them, if not, please provide your debug.log using one of the sites linked in my signature below