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I dont know why but the modpack i created just crashes when i press the launch button

here is the Log

[14:05:10] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker[14:05:10] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker[14:05:11] [main/INFO]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker[14:05:11] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker[14:05:11] [main/INFO]: Forge Mod Loader version 13.20.1.2588 for Minecraft 1.11.2 loading[14:05:11] [main/INFO]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_25, running on Windows 10:amd64:10.0, installed at C:\Users\Funky\Documents\Curse\Minecraft\Install\runtime\jre-x64\1.8.0_25[14:05:11] [main/WARN]: The coremod codechicken.lib.asm.CCLCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft[14:05:11] [main/WARN]: The coremod cofh.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft[14:05:11] [main/WARN]: The coremod openmods.core.OpenModsCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft[14:05:11] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker[14:05:11] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker[14:05:11] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker[14:05:11] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker[14:05:11] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper[14:05:12] [main/FATAL]: Patcher expecting non-empty class data file for net.minecraft.entity.SharedMonsterAttributes, but received empty.[14:05:12] [main/ERROR]: Unable to launchjava.lang.RuntimeException: java.lang.RuntimeException: Patcher expecting non-empty class data file for net.minecraft.entity.SharedMonsterAttributes, but received empty, your vanilla jar may be corrupt. at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:170) ~[forge-1.11.2-13.20.1.2588.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.RuntimeException: Patcher expecting non-empty class data file for net.minecraft.entity.SharedMonsterAttributes, but received empty, your vanilla jar may be corrupt. at net.minecraftforge.fml.common.patcher.ClassPatchManager.applyPatch(ClassPatchManager.java:112) ~[forge-1.11.2-13.20.1.2588.jar:?] at net.minecraftforge.fml.common.patcher.ClassPatchManager.getPatchedResource(ClassPatchManager.java:75) ~[forge-1.11.2-13.20.1.2588.jar:?] at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.getFieldType(FMLDeobfuscatingRemapper.java:220) ~[forge-1.11.2-13.20.1.2588.jar:?] at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.parseField(FMLDeobfuscatingRemapper.java:193) ~[forge-1.11.2-13.20.1.2588.jar:?] at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.setup(FMLDeobfuscatingRemapper.java:162) ~[forge-1.11.2-13.20.1.2588.jar:?] at net.minecraftforge.fml.common.asm.FMLSanityChecker.injectData(FMLSanityChecker.java:189) ~[forge-1.11.2-13.20.1.2588.jar:?] at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:165) ~[forge-1.11.2-13.20.1.2588.jar:?] ... 2 more[14:05:12] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:1052]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException[14:05:12] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)[14:05:12] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)[14:05:12] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Runtime.exit(Runtime.java:107)[14:05:12] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.System.exit(System.java:968)[14:05:12] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)[14:05:12] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

Thank you

hmm i did that but the same thing happened it seems that the twitch client keeps giving me corrupted versions of minecraft