Packed file akka-actor_2.11-2.3.3.jar not unpacking

[VictoriaCrow]

I'm trying to install Forge 1.12.2-14.23.5.2768 and it won't fully load. I have no clue what the issue is as I got the game yesterday and I don't understand any of the text in the installer log. I'll put the entire log below because I don't know what is useful information and what isn't. I'm using Java SE Development Kit 14 to try and install this. I've deleted the forge file and reinstalled it, that hasn't helped. I've tried launching the 1.12.2 version of Minecraft, closing the game, and then trying to install, that hasn't helped. I'm just out of my depth here, any assistance would be amazing.

 

 

 

 

Spoiler

java.net.preferIPv4Stack=true
Considering library net.minecraftforge:forge:1.12.2-14.23.5.2768: Not Downloading {Wrong Side}
Considering library net.minecraft:launchwrapper:1.12: Not Downloading {Wrong Side}
Considering library org.ow2.asm:asm-all:5.2
Considering library org.jline:jline:3.5.1: Not Downloading {Wrong Side}
Considering library net.java.dev.jna:jna:4.4.0: Not Downloading {Wrong Side}
Considering library com.typesafe.akka:akka-actor_2.11:2.3.3
Checking "/Users/Guest/Library/Application Support/minecraft/libraries/com/typesafe/akka/akka-actor_2.11/2.3.3/akka-actor_2.11-2.3.3.jar" internal checksums
    checksums.sha1 was not found, validation failed
Downloading library com.typesafe.akka:akka-actor_2.11:2.3.3
Unpacking packed file akka-actor_2.11-2.3.3.jar.pack.xz
  Signed
  Checksum Length: 140942
  Total Length:    2606968
  Temp File:       /var/folders/02/5gpgwyyd37dbb7tys77nx_r80000gn/T/art16664331154368268868.pack
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:564)
    at net.minecraftforge.installer.Java6Gate.main(Java6Gate.java:48)
Caused by: java.lang.NoClassDefFoundError: java/util/jar/Pack200
    at net.minecraftforge.installer.DownloadUtils.unpackLibrary(DownloadUtils.java:253)
    at net.minecraftforge.installer.DownloadUtils.downloadInstalledLibraries(DownloadUtils.java:89)
    at net.minecraftforge.installer.ClientInstall.run(ClientInstall.java:131)
    at net.minecraftforge.installer.InstallerAction.run(InstallerAction.java:43)
    at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:406)
    at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:168)
    at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:54)
    ... 5 more
Caused by: java.lang.ClassNotFoundException: java.util.jar.Pack200
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    ... 12 more