Cannot install forge 1.7.10

[HelplessMinecrafter]

No matter what I try I cannot get forge 1.7.10 to install.
I've tried the windows installer, which will not open unless I disconnect my wifi and if I do it that way I get this error.
"These libraries failed to download. Try again.
org.scala-lang.plugins:scala-continuations-library_2.11:1.0.2

org.scala-lang.plugins:scala-continuations-plugin_2.11:1.0.2"

When I try it with my wifi connected it doesn't do anything and creates a log saying this
"Exception in thread "main" java.lang.ExceptionInInitializerError
    at net.minecraftforge.installer.ClientInstall.getSponsorMessage(ClientInstall.java:326)
    at net.minecraftforge.installer.InstallerAction.getSponsorMessage(InstallerAction.java:59)
    at net.minecraftforge.installer.InstallerPanel.updateFilePath(InstallerPanel.java:236)
    at net.minecraftforge.installer.InstallerPanel.<init>(InstallerPanel.java:217)
    at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:153)
    at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:40)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 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)
    ... 6 more
"

If I try to open the jar, it just doesnt do anything.

If I use the method for running the jar via powershell, I get this error.
"PS D:\Downloads> java -Djava.net.preferIPv4Stack=true -jar 1.7.10
Error: Could not find or load main class .net.preferIPv4Stack=true
Caused by: java.lang.ClassNotFoundException: /net/preferIPv4Stack=true"

I've tried installing an older version of java and still it doesnt work.

PLEASE HELP. I really want to play a certain 1.7.10 mod

Edited April 21, 2021 by HelplessMinecrafter