Recentely I had a problem with forge. I read the Log and looks like is with 'SoundEngineFixTransformer'

-My mods folder is empty

-1.12 forge works

Here's the log

Quote

[20:45:25] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[20:45:25] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[20:45:25] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[20:45:25] [main/INFO] [FML]: Forge Mod Loader version 14.23.4.2758 for Minecraft 1.12.2 loading
[20:45:25] [main/INFO] [FML]: Java is Java HotSpot(TM) Client VM, version 1.8.0_51, running on Windows 10:x86:10.0, installed at C:\Program Files\Minecraft\runtime\jre-x32\1.8.0_51
[20:45:26] [main/INFO] [FML]: Searching C:\Users\Gamito\AppData\Roaming\.minecraft\mods for mods
[20:45:26] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[20:45:26] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[20:45:26] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[20:45:26] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[20:45:26] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[20:45:27] [main/ERROR] [LaunchWrapper]: A critical problem occurred registering the ASM transformer class $wrapper.net.minecraftforge.fml.common.asm.transformers.EventSubscriberTransformer
java.lang.ClassNotFoundException: $wrapper.net.minecraftforge.fml.common.asm.transformers.EventSubscriberTransformer
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
    at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:88) [launchwrapper-1.12.jar:?]
    at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:131) [forge-1.12.2-14.23.4.2758.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: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer@fbd1f6 from coremod FMLCorePlugin
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:260) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
    ... 6 more
Caused by: java.lang.ClassCircularityError: net/minecraftforge/fml/common/eventhandler/Event
    at net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer.buildEvents(EventSubscriptionTransformer.java:107) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer.transform(EventSubscriptionTransformer.java:82) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
    ... 6 more
[20:45:27] [main/ERROR] [LaunchWrapper]: A critical problem occurred registering the ASM transformer class $wrapper.net.minecraftforge.fml.common.asm.transformers.SoundEngineFixTransformer
java.lang.ClassNotFoundException: $wrapper.net.minecraftforge.fml.common.asm.transformers.SoundEngineFixTransformer
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
    at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:88) [launchwrapper-1.12.jar:?]
    at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:131) [forge-1.12.2-14.23.4.2758.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: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer@fbd1f6 from coremod FMLCorePlugin
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:260) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
    ... 6 more
Caused by: java.lang.ClassCircularityError: net/minecraftforge/fml/common/eventhandler/Event
    at net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer.buildEvents(EventSubscriptionTransformer.java:107) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer.transform(EventSubscriptionTransformer.java:82) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
    ... 6 more
[20:45:27] [main/ERROR] [LaunchWrapper]: Unable to launch
java.lang.RuntimeException: java.lang.ClassNotFoundException: net.minecraftforge.fml.common.asm.FMLSanityChecker
    at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:168) ~[forge-1.12.2-14.23.4.2758.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: net.minecraftforge.fml.common.asm.FMLSanityChecker
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_51]
    at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_51]
    at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:156) ~[forge-1.12.2-14.23.4.2758.jar:?]
    ... 2 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.BlamingTransformer@e24091 from coremod FMLCorePlugin
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:260) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_51]
    at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_51]
    at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:156) ~[forge-1.12.2-14.23.4.2758.jar:?]
    ... 2 more
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang3/JavaVersion
    at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer$VersionVisitor.visit(BlamingTransformer.java:74) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at org.objectweb.asm.ClassReader.accept(Unknown Source) ~[asm-all-5.2.jar:5.2]
    at org.objectweb.asm.ClassReader.accept(Unknown Source) ~[asm-all-5.2.jar:5.2]
    at net.minecraftforge.fml.common.asm.transformers.BlamingTransformer.transform(BlamingTransformer.java:53) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256) ~[forge-1.12.2-14.23.4.2758.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_51]
    at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_51]
    at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:156) ~[forge-1.12.2-14.23.4.2758.jar:?]
    ... 2 more
[20:45:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[20:45:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[20:45:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
[20:45:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at java.lang.Runtime.exit(Runtime.java:107)
[20:45:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at java.lang.System.exit(System.java:971)
[20:45:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
[20:45:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
 

 

Try re-downloading 2758

No, I disabled shaders and now I can play again =/

Idk why shaders is doing this...