Cannot install Forge 1.20.1 - Installer doesnt even starts

[Wolfseye]

Hi,

i just tried to install Forge 1.20.1 on my PC (Windows), but the installer does not even start. There is a log file which says the following:

 

JVM info: Eclipse Adoptium - 21.0.2 - 21.0.2+13-LTS
java.net.preferIPv4Stack=true
Current Time: 03/02/2024 20:25:11
Exception in thread "main" 
java.lang.IllegalArgumentException: URI has an authority component
    at java.base/java.io.File.<init>(File.java:425)
    at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:78)

I have already multiple other versions installed, which work all fine.

1.12.2 , 1.16.4 , 1.18.2 , 1.19.4 , 1.20.4 

they all work and were installed fine. How come this one wouldnt work ?

Any info is appreciated.
Thanks.

[TileEntity]

Use Java 17 instead of Java 21

[Wolfseye]

Hi @TileEntity

 

How come other versions, older and even newer work with that version I have ? Not that I install Java 17 now, and then this doesnt work with other Game versions.
Do I need to uninstall the 21er now, and then install 17er, or does it just overinstall it ? With Oracle Java (which for some reason atm doesnt work on my PC) installing a different version, it usually asked me if I want to get rid of the old one before.
Thanks

 

JVM info: Eclipse Adoptium - 17.0.10 - 17.0.10+7
java.net.preferIPv4Stack=true
Current Time: 03/02/2024 21:22:11
Exception in thread "main" 
java.lang.IllegalArgumentException: URI has an authority component
    at java.base/java.io.File.<init>(File.java:425)
    at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:78)

Hmm ....

Edited February 3 by Wolfseye

[TileEntity]

Maybe some kind of Network error - I am not sure

 

 

[Wolfseye]

Just tried another Forge version install, 1.17.1 , same error. Could it be a problem with the connection to where the server files are downloaded from by the installer ?

[TileEntity]

Is there an installer log? Add this one with sites like

https://paste.ee/

 

Edited February 3 by TileEntity

[Wolfseye]

The log is what I posted above in the Code tags. That file is created when the installer "tries" to run. More I dont have.

[TileEntity]

Temporarily switch to the Technic Launcher and install a clean forge modpack and use this as working base