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Quote from P3nguincookie»

forge-1.12.2-14.23.5.2768-installer

All this from the log/ and when i use cmd to try to open it. if anyone has an idea for a fix would be much appreciated.

java.net.preferIPv4Stack=true
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
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: 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

post the whole crash report, not just the bit you think is important