Forge Error downloading

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While trying to install the recommended forge i got an error (as shown in the screenshot_172)

i followed the steps in a previous post and by using the java -DJava.net.prefer.... command i got the screen (screenshot_173)

Any help please?

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6 minutes ago, diesieben07 said:

The command you used is for the installer, not the universal jar.

When using the command on the installer i get the following:

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1 minute ago, diesieben07 said:

Then that jar file does not exist. I doubt you have a jar file without the jar file extension.

After adding .jar (mb) it opened up the installer yet i got the same error as before "these libraries..."

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Here,

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1 hour ago, diesieben07 said:

Post the output of the installer

Also added the log (if thats what u meant)

 

forge-1.12.2-14.23.4.2705-installer.jar.log

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Alright thanks anyway

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Just now, diesieben07 said:

Something is preventing the file from being downloaded properly. I do not know what.

Is there a chance you could link me to a simple how to install forge manually? most of the ones i found were outdated and really hard to understand