When you run the installer, it does not run and only creates a log file. I've tested Java versions 8 to 21, but it doesn't work.

 

JVM info: Oracle Corporation - 17.0.10 - 17.0.10+11-LTS-240
java.net.preferIPv4Stack=true
Current Time: 28/02/2024 01:24:31
Host: files.minecraftforge.net [51.79.83.165]
Host: maven.minecraftforge.net [51.79.83.165]
Host: libraries.minecraft.net [13.107.213.74, 13.107.246.74]
Host: launchermeta.mojang.com [13.107.213.74, 13.107.246.74]
Host: piston-meta.mojang.com [13.107.246.74, 13.107.213.74]
java.net.UnknownHostException: 알려진 호스트가 없습니다 (authserver.mojang.com)
    at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
    at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:933)
    at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1543)
    at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:852)
    at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1532)
    at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1384)
    at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1305)
    at net.minecraftforge.installer.DownloadUtils.getIps(DownloadUtils.java:290)
    at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:120)
Exception in thread "main" 
java.lang.NullPointerException: Cannot invoke "java.util.List.stream()" because the return value of "net.minecraftforge.installer.DownloadUtils.getIps(String)" is null
    at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:120)
 

This is a known issue caused by Mojang abruptly removing one of their domain names. A fix is underway.

Announcement from the Forge discord: https://discord.com/channels/1129059589325852724/1129077934330744882/1212091927038533662

Invite link: https://discord.minecraftforge.net

Download a fresh copy of the installer and it should be fixed.

https://discord.com/channels/1129059589325852724/1129077934330744882/1212138871907684382