nov. 30, 2015 7:20:38 PM net.minecraft.launchwrapper.LogWrapper logINFOS: Loading tweak class name optifine.OptiFineTweakernov. 30, 2015 7:20:38 PM net.minecraft.launchwrapper.LogWrapper logINFOS: Using primary tweak class name optifine.OptiFineTweakernov. 30, 2015 7:20:38 PM net.minecraft.launchwrapper.LogWrapper logINFOS: Calling tweak class optifine.OptiFineTweakerOptiFineTweaker: acceptOptionsOptiFineTweaker: injectIntoClassLoader skipped, OptiFine is loaded as a libraryOptiFineTweaker: getLaunchArgumentsOptiFineTweaker: getLaunchTargetnov. 30, 2015 7:20:38 PM net.minecraft.launchwrapper.LogWrapper logINFOS: Launching wrapped minecraft {net.minecraft.client.main.Main}nov. 30, 2015 7:20:38 PM net.minecraft.launchwrapper.LogWrapper logGRAVE: Unable to launchjava.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.minecraft.launchwrapper.Launch.launch(Launch.java:131)	at net.minecraft.launchwrapper.Launch.main(Launch.java:27)Caused by: java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager	at bao.<clinit>(SourceFile:84)	at net.minecraft.client.main.Main.main(SourceFile:72)	... 6 moreCaused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.LogManager	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:179)	at java.lang.ClassLoader.loadClass(Unknown Source)	at java.lang.ClassLoader.loadClass(Unknown Source)	... 8 moreCaused by: java.lang.NullPointerException	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:171)	... 10 more