[15:30:32] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[15:30:32] [main/ERROR]: Unable to launch
java.lang.ClassNotFoundException: cpw.mods.fml.common.launcher.FMLTweaker
 at java.net.URLClassLoader$1.run(URLClassLoader.java:372) ~[?:1.8.0_25]
 at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[?:1.8.0_25]
 at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_25]
 at java.net.URLClassLoader.findClass(URLClassLoader.java:360) ~[?:1.8.0_25]
 at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_25]
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) ~[?:1.8.0_25]
 at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_25]
 at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106)