RLCraft Server Setup Assistance

Need help setting up a server on Ubuntu 18.04I have a designated user for the server itself and it's running java 8the issue I'm running into is with forge not installing at allthis is the direct log dump:pharaoh@Pyramidion:/opt/modded-minecraft/RLCraft$ java -jar forge-1.12.2-14.23.5.2838-installer.jar --installServer

Setting up logger: /opt/modded-minecraft/RLCraft/forge-1.12.2-14.23.5.2838-installer.jar.log

java.net.preferIPv4Stack=true

Installing server to current directory

A problem installing the server was detected, server install cannot continue

Here's a secondary dump without the --installServer operand
pharaoh@Pyramidion:/opt/modded-minecraft/RLCraft$ java -jar forge-1.12.2-14.23.5.2838-installer.jar

Setting up logger: /opt/modded-minecraft/RLCraft/forge-1.12.2-14.23.5.2838-installer.jar.log

java.net.preferIPv4Stack=true

Exception in thread "main" java.lang.reflect.InvocationTargetException

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:566)

at net.minecraftforge.installer.Java6Gate.main(Java6Gate.java:48)

Caused by: java.lang.ExceptionInInitializerError

at net.minecraftforge.installer.ClientInstall.getSponsorMessage(ClientInstall.java:401)

at net.minecraftforge.installer.InstallerAction.getSponsorMessage(InstallerAction.java:60)

at net.minecraftforge.installer.InstallerPanel.updateFilePath(InstallerPanel.java:334)

at net.minecraftforge.installer.InstallerPanel.<init>(InstallerPanel.java:315)

at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:167)

at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:54)

... 5 more

Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1

at net.minecraftforge.installer.MirrorData.buildMirrorList(MirrorData.java:84)

at net.minecraftforge.installer.MirrorData.<init>(MirrorData.java:63)

at net.minecraftforge.installer.MirrorData.<clinit>(MirrorData.java:17)

... 11 more