Hi

 

I'm using the SKLauncher (https://github.com/skcraft/launcher) for my own modpacks! With Forge 1.6 and 1.7 i had no problems, but I don't get forge1.8 to work.

I get only 1 error

The game is running. Please wait.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/logging/log4j/Level
at net.minecraft.launchwrapper.Launch.launch(Launch.java:94)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.Level
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 2 more
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128M; support was removed in 8.0
Picked up _JAVA_OPTIONS: -Djava.net.preferIPv4Stack=true
Process ended with code: 1

I also tried older version of forge, but still the same error. Until now I removed all mods but still the same error.

not a forge problem