When I selected Forge in the launcher and in my "edit profile" it disappeared and came back with with the following error:

 

2017-01-31 13:54:08,268 WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream[/size]2017-01-31 13:54:08,271 WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream[13:54:08] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker[13:54:08] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker[13:54:08] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker[13:54:08] [main/INFO] [FML]: Forge Mod Loader version 13.19.1.2199 for Minecraft 1.11 loading[13:54:08] [main/INFO] [FML]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_25, running on Windows 10:amd64:10.0, installed at C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]: java.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/IFMLLoadingPlugin[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.lang.ClassLoader.defineClass1(Native Method)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.net.URLClassLoader$1.run(URLClassLoader.java:367)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.security.AccessController.doPrivileged(Native Method)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.lang.Class.forName0(Native Method)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at java.lang.Class.forName(Class.java:344)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraftforge.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:564)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraftforge.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:425)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraftforge.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:255)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:102)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:79)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraftforge.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:41)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraftforge.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:138)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)[13:54:08] [main/INFO] [sTDERR]: [net.minecraftforge.fml.relauncher.FMLLaunchHandler:setupHome:106]:    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:634]: Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.relauncher.IFMLLoadingPlugin[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:634]:    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:634]:    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:634]:    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:634]:    ... 23 more[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:643]: Caused by: java.lang.NullPointerException[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:643]:    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:643]:    ... 25 more[13:54:08] [main/ERROR] [FML]: An error occurred trying to configure the minecraft home at C:\Users\Hendriek\AppData\Roaming\.minecraft for Forge Mod Loaderjava.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/IFMLLoadingPlugin  at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_25]  at java.lang.ClassLoader.defineClass(ClassLoader.java:760) ~[?:1.8.0_25]  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_25]  at java.net.URLClassLoader.defineClass(URLClassLoader.java:455) ~[?:1.8.0_25]  at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[?:1.8.0_25]  at java.net.URLClassLoader$1.run(URLClassLoader.java:367) ~[?: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 net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117) ~[launchwrapper-1.12.jar:?]  at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_25]  at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_25]  at java.lang.Class.forName0(Native Method) ~[?:1.8.0_25]  at java.lang.Class.forName(Class.java:344) ~[?:1.8.0_25]  at net.minecraftforge.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:564) ~[forge-1.11-13.19.1.2199.jar:?]  at net.minecraftforge.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:425) ~[forge-1.11-13.19.1.2199.jar:?]  at net.minecraftforge.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:255) ~[forge-1.11-13.19.1.2199.jar:?]  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:102) [forge-1.11-13.19.1.2199.jar:?]  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:79) [forge-1.11-13.19.1.2199.jar:?]  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:41) [forge-1.11-13.19.1.2199.jar:?]  at net.minecraftforge.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:138) [forge-1.11-13.19.1.2199.jar:?]  at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]  at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.relauncher.IFMLLoadingPlugin  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]  at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_25]  at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_25]  ... 23 moreCaused by: java.lang.NullPointerException  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.12.jar:?]  at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_25]  at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_25]  ... 23 moreException in thread "main" [13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/IFMLLoadingPlugin[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.lang.ClassLoader.defineClass1(Native Method)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.net.URLClassLoader$1.run(URLClassLoader.java:367)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.security.AccessController.doPrivileged(Native Method)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.lang.Class.forName0(Native Method)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at java.lang.Class.forName(Class.java:344)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraftforge.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:564)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraftforge.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:425)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraftforge.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:255)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:102)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:79)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraftforge.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:41)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraftforge.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:138)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.relauncher.IFMLLoadingPlugin[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[13:54:08] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1061]:    ... 23 more[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:643]: Caused by: java.lang.NullPointerException[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:643]:    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)[13:54:08] [main/INFO] [sTDERR]: [java.lang.Throwable:printStackTrace:643]:    ... 25 more

Please help

Thanks

java.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/IFMLLoadingPlugin

 

You installed a coremod built for 1.7.10 or earlier, but you're running 1.11.

 

Mods (especially coremods) usually only work for the version of Minecraft that they were built for. The download page and file name will usually tell you this version.

 

Side note: The log you posted was completely unreadable, I had to quote it and copy it into an external editor to read it. In future, please upload the full FML log (the logs/fml-client-latest.log file in the game directory, not the console output from the launcher) to Gist and link it here.