When I downloaded the 1.15 version on the 1.12.2 update of SteveKunG's Lib, there is no sound at all in my game, can someone help?

What???? Why install 1.15 mod on 1.12.2???

No, 1.15 is the version of the mod itself, not the update

Wait i mean 1.1.5

OK, My library doesn't do anything with sound system.

Well when I get rid of that mod and More Planets I can hear everything just fine, do you want me to list the mods that I have?

You should provide log instead. Upload into pastebin or somewhere.

Is this it?

[13:19:12] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[13:19:12] [main/INFO]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[13:19:12] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[13:19:12] [main/INFO]: Forge Mod Loader version 14.23.5.2847 for Minecraft 1.12.2 loading
[13:19:12] [main/INFO]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_251, running on Windows 10:amd64:10.0, installed at C:\Program Files\Java\jre1.8.0_251
[13:19:12] [main/WARN]: The coremod FMLCorePlugin (net.minecraftforge.fml.relauncher.FMLCorePlugin) is not signed!
[13:19:12] [main/WARN]: The coremod FMLForgePlugin (net.minecraftforge.classloading.FMLForgePlugin) is not signed!
[13:19:12] [main/INFO]: Searching C:\Users\Owner\AppData\Roaming.technic\modpacks\something-fun-remastered\mods for mods
[13:19:12] [main/WARN]: Found FMLCorePluginContainsFMLMod marker in GalaxySpace-1.12.2-2.0.13.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[13:19:12] [main/WARN]: The coremod galaxyspace.core.hooks.GSHooksLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[13:19:12] [main/WARN]: The coremod GSHooksLoader (galaxyspace.core.hooks.GSHooksLoader) is not signed!
[13:19:12] [main/WARN]: The coremod micdoodle8.mods.miccore.MicdoodlePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[13:19:12] [main/WARN]: The coremod MicdoodlePlugin (micdoodle8.mods.miccore.MicdoodlePlugin) is not signed!
[13:19:12] [main/INFO]: Loading tweaker org.spongepowered.asm.launch.MixinTweaker from More-Planets-1.12.2-2.1.12-GC251 (1).jar
[13:19:12] [main/INFO]: Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.12.2_HD_U_F5.jar
[13:19:12] [main/INFO]: Loading tweaker org.spongepowered.asm.launch.MixinTweaker from SteveKunG's-Lib-1.12.2-1.1.5-deobf.jar
[13:19:12] [main/INFO]: Loading tweaker org.spongepowered.asm.launch.MixinTweaker from SteveKunG's-Lib-1.12.2-1.1.5.jar
[13:19:12] [main/WARN]: Found FMLCorePluginContainsFMLMod marker in themidnight-0.3.5.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[13:19:12] [main/WARN]: The coremod midnight (com.mushroom.midnight.core.MidnightLoadingPlugin) is not signed!
[13:19:12] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[13:19:12] [main/INFO]: Loading tweak class name org.spongepowered.asm.launch.MixinTweaker
[13:19:12] [main/INFO]: SpongePowered MIXIN Subsystem Version=0.7.11 Source=file:/C:/Users/Owner/AppData/Roaming/.technic/modpacks/something-fun-remastered/mods/More-Planets-1.12.2-2.1.12-GC251%20(1).jar Service=LaunchWrapper Env=CLIENT
[13:19:12] [main/DEBUG]: Instantiating coremod class SteveKunGLibPlugin
[13:19:12] [main/INFO]: Initializing SteveKunG's Lib plugin!
[13:19:12] [main/INFO]: Compatibility level set to JAVA_8
[13:19:12] [main/DEBUG]: The coremod stevekung.mods.stevekunglib.core.SteveKunGLibPlugin requested minecraft version 1.12.2 and minecraft is 1.12.2. It will be loaded.
[13:19:12] [main/WARN]: The coremod SteveKunGLibPlugin (stevekung.mods.stevekunglib.core.SteveKunGLibPlugin) is not signed!
[13:19:12] [main/DEBUG]: Enqueued coremod SteveKunGLibPlugin
[13:19:12] [main/INFO]: Loading tweak class name optifine.OptiFineForgeTweaker
[13:19:12] [main/WARN]: Tweak class name org.spongepowered.asm.launch.MixinTweaker has already been visited -- skipping
[13:19:12] [main/WARN]: Tweak class name org.spongepowered.asm.launch.MixinTweaker has already been visited -- skipping
[13:19:12] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[13:19:12] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[13:19:12] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[13:19:12] [main/INFO]: Calling tweak class optifine.OptiFineForgeTweaker
[13:19:12] [main/INFO]: [optifine.OptiFineForgeTweaker:dbg:56]: OptiFineForgeTweaker: acceptOptions
[13:19:12] [main/INFO]: [optifine.OptiFineForgeTweaker:dbg:56]: OptiFineForgeTweaker: injectIntoClassLoader
[13:19:12] [main/INFO]: [optifine.OptiFineClassTransformer:dbg:242]: OptiFine ClassTransformer
[13:19:12] [main/INFO]: [optifine.OptiFineClassTransformer:dbg:242]: OptiFine ZIP file: C:\Users\Owner\AppData\Roaming.technic\modpacks\something-fun-remastered\mods\OptiFine_1.12.2_HD_U_F5.jar
[13:19:12] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[13:19:12] [main/DEBUG]: Injecting coremod FMLCorePlugin {net.minecraftforge.fml.relauncher.FMLCorePlugin} class transformers
[13:19:12] [main/TRACE]: Registering transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer
[13:19:12] [main/TRACE]: Registering transformer net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer
[13:19:12] [main/TRACE]: Registering transformer net.minecraftforge.fml.common.asm.transformers.EventSubscriberTransformer
[13:19:12] [main/TRACE]: Registering transformer net.minecraftforge.fml.common.asm.transformers.SoundEngineFixTransformer
[13:19:12] [main/DEBUG]: Injection complete
[13:19:12] [main/DEBUG]: Running coremod plugin for FMLCorePlugin {net.minecraftforge.fml.relauncher.FMLCorePlugin}
[13:19:12] [main/DEBUG]: Running coremod plugin FMLCorePlugin
[13:19:14] [main/INFO]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[13:19:14] [main/ERROR]: FML appears to be missing any signature data. This is not a good thing
[13:19:14] [main/DEBUG]: Coremod plugin class FMLCorePlugin run successfully
[13:19:14] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[13:19:14] [main/DEBUG]: Injecting coremod FMLForgePlugin {net.minecraftforge.classloading.FMLForgePlugin} class transformers
[13:19:14] [main/DEBUG]: Injection complete
[13:19:14] [main/DEBUG]: Running coremod plugin for FMLForgePlugin {net.minecraftforge.classloading.FMLForgePlugin}
[13:19:14] [main/DEBUG]: Running coremod plugin FMLForgePlugin
[13:19:14] [main/DEBUG]: Coremod plugin class FMLForgePlugin run successfully
[13:19:14] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[13:19:14] [main/DEBUG]: Injecting coremod GSHooksLoader {galaxyspace.core.hooks.GSHooksLoader} class transformers
[13:19:14] [main/TRACE]: Registering transformer galaxyspace.core.hooklib.minecraft.PrimaryClassTransformer
[13:19:14] [main/INFO]: [galaxyspace.core.hooklib.asm.HookLogger$SystemOutLogger:debug:20]: [DEBUG] Parsing hooks container galaxyspace.core.hooklib.minecraft.SecondaryTransformerHook
[13:19:14] [main/INFO]: [HOOKLIB] Obfuscated: true
[13:19:14] [main/DEBUG]: Injection complete
[13:19:14] [main/DEBUG]: Running coremod plugin for GSHooksLoader {galaxyspace.core.hooks.GSHooksLoader}
[13:19:14] [main/DEBUG]: Running coremod plugin GSHooksLoader
[13:19:14] [main/INFO]: [galaxyspace.core.hooklib.asm.HookLogger$SystemOutLogger:debug:20]: [DEBUG] Parsing hooks container galaxyspace.core.hooks.GSHooksManager
[13:19:14] [main/DEBUG]: Coremod plugin class GSHooksLoader run successfully
[13:19:14] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[13:19:14] [main/DEBUG]: Injecting coremod MicdoodlePlugin {micdoodle8.mods.miccore.MicdoodlePlugin} class transformers
[13:19:14] [main/INFO]: [micdoodle8.mods.miccore.MicdoodlePlugin:getASMTransformerClass:99]: Successfully Registered Transformer
[13:19:14] [main/TRACE]: Registering transformer micdoodle8.mods.miccore.MicdoodleTransformer
[13:19:14] [main/DEBUG]: Injection complete
[13:19:14] [main/DEBUG]: Running coremod plugin for MicdoodlePlugin {micdoodle8.mods.miccore.MicdoodlePlugin}
[13:19:14] [main/DEBUG]: Running coremod plugin MicdoodlePlugin
[13:19:15] [main/INFO]: [micdoodle8.mods.miccore.MicdoodlePlugin:injectData:292]: [Micdoodle8Core]: Patching game...
[13:19:15] [main/INFO]: [micdoodle8.mods.miccore.MicdoodlePlugin:injectData:292]: [Micdoodle8Core]: Patching game...
[13:19:15] [main/DEBUG]: Coremod plugin class MicdoodlePlugin run successfully
[13:19:15] [main/INFO]: Calling tweak class org.spongepowered.asm.launch.MixinTweaker
[13:19:15] [main/INFO]: Initialised Mixin FML Remapper Adapter with net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper@4d065e1a
[13:19:15] [main/DEBUG]: Injecting coremod SteveKunGLibPlugin {stevekung.mods.stevekunglib.core.SteveKunGLibPlugin} class transformers
[13:19:15] [main/DEBUG]: Injection complete
[13:19:15] [main/DEBUG]: Running coremod plugin for SteveKunGLibPlugin {stevekung.mods.stevekunglib.core.SteveKunGLibPlugin}
[13:19:15] [main/DEBUG]: Running coremod plugin SteveKunGLibPlugin
[13:19:15] [main/DEBUG]: Coremod plugin class SteveKunGLibPlugin run successfully
[13:19:15] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[13:19:15] [main/DEBUG]: Validating minecraft
[13:19:15] [main/INFO]: [galaxyspace.core.hooklib.asm.HookLogger$SystemOutLogger:debug:20]: [DEBUG] Injecting hooks into class net.minecraftforge.fml.common.Loader
[13:19:15] [main/INFO]: [galaxyspace.core.hooklib.asm.HookLogger$SystemOutLogger:debug:20]: [DEBUG] Patching method net.minecraftforge.fml.common.Loader#injectData([Ljava/lang/Object;)
[13:19:15] [main/INFO]: [galaxyspace.core.hooklib.asm.HookLogger$SystemOutLogger:debug:20]: [DEBUG] Methods dictionary loaded in 4 ms
[13:19:15] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[13:19:15] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[13:19:15] [main/INFO]: Loading tweak class name org.spongepowered.asm.mixin.EnvironmentStateTweaker
[13:19:15] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[13:19:15] [main/INFO]: Calling tweak class org.spongepowered.asm.mixin.EnvironmentStateTweaker
[13:19:15] [main/INFO]: [optifine.OptiFineForgeTweaker:dbg:56]: OptiFineForgeTweaker: getLaunchArguments
[13:19:15] [main/INFO]: [galaxyspace.core.hooklib.asm.HookLogger$SystemOutLogger:debug:20]: [DEBUG] Injecting hooks into class net.minecraft.world.World
[13:19:15] [main/INFO]: [galaxyspace.core.hooklib.asm.HookLogger$SystemOutLogger:debug:20]: [DEBUG] Patching method net.minecraft.world.World#setBlockState(Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/state/IBlockState;I)
[13:19:16] [main/INFO]: Launching wrapped minecraft {net.minecraft.client.main.Main}
[13:19:16] [main/INFO]: [galaxyspace.core.hooklib.asm.HookLogger$SystemOutLogger:debug:20]: [DEBUG] Injecting hooks into class net.minecraft.world.World
[13:19:16] [main/FATAL]: Mixin apply failed mixins.stevekung's_lib.json:WorldMixin -> net.minecraft.world.World: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException @shadow method getBlockState in mixins.stevekung's_lib.json:WorldMixin was not located in the target class net.minecraft.world.World. Using refmap mixins.stevekung's_lib.refmap.json
org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: @shadow method getBlockState in mixins.stevekung's_lib.json:WorldMixin was not located in the target class net.minecraft.world.World. Using refmap mixins.stevekung's_lib.refmap.json
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachSpecialMethod(MixinPreProcessorStandard.java:387) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachShadowMethod(MixinPreProcessorStandard.java:360) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachMethods(MixinPreProcessorStandard.java:293) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:261) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:241) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1144) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:267) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:353) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.apply(MixinTransformer.java:724) [More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.applyMixins(MixinTransformer.java:703) [More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:509) [More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72) [More-Planets-1.12.2-2.1.12-GC251%20(1).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(Unknown Source) [?:1.8.0_251]
at java.lang.ClassLoader.loadClass(Unknown Source) [?:1.8.0_251]
at net.minecraft.client.main.Main.main(SourceFile:38) [Main.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_251]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_251]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [mixins.stevekung's_lib.json:WorldMixin] from phase [DEFAULT] in config [mixins.stevekung's_lib.json] FAILED during APPLY
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.handleMixinError(MixinTransformer.java:779)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.handleMixinApplyError(MixinTransformer.java:732)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:513)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at java.lang.ClassLoader.loadClass(Unknown Source)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at java.lang.ClassLoader.loadClass(Unknown Source)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.client.main.Main.main(SourceFile:38)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at java.lang.reflect.Method.invoke(Unknown Source)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
[13:19:16] [main/INFO]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: @shadow method getBlockState in mixins.stevekung's_lib.json:WorldMixin was not located in the target class net.minecraft.world.World. Using refmap mixins.stevekung's_lib.refmap.json
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachSpecialMethod(MixinPreProcessorStandard.java:387)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachShadowMethod(MixinPreProcessorStandard.java:360)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachMethods(MixinPreProcessorStandard.java:293)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:261)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:241)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1144)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:267)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:353)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.apply(MixinTransformer.java:724)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.applyMixins(MixinTransformer.java:703)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:509)
[13:19:16] [main/INFO]: [java.lang.Throwable:printStackTrace:-1]: ... 12 more
[13:19:16] [main/ERROR]: Unable to launch
java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_251]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_251]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/world/World
at net.minecraft.client.main.Main.main(SourceFile:38) ~[Main.class:?]
... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.world.World
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
at net.minecraft.client.main.Main.main(SourceFile:38) ~[Main.class:?]
... 6 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:521) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).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(Unknown Source) ~[?:1.8.0_251]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
at net.minecraft.client.main.Main.main(SourceFile:38) ~[Main.class:?]
... 6 more
Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [mixins.stevekung's_lib.json:WorldMixin] from phase [DEFAULT] in config [mixins.stevekung's_lib.json] FAILED during APPLY
at org.spongepowered.asm.mixin.transformer.MixinTransformer.handleMixinError(MixinTransformer.java:779) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.handleMixinApplyError(MixinTransformer.java:732) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:513) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).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(Unknown Source) ~[?:1.8.0_251]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
at net.minecraft.client.main.Main.main(SourceFile:38) ~[Main.class:?]
... 6 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: @shadow method getBlockState in mixins.stevekung's_lib.json:WorldMixin was not located in the target class net.minecraft.world.World. Using refmap mixins.stevekung's_lib.refmap.json
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachSpecialMethod(MixinPreProcessorStandard.java:387) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachShadowMethod(MixinPreProcessorStandard.java:360) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachMethods(MixinPreProcessorStandard.java:293) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:261) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:241) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1144) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:267) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:353) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.apply(MixinTransformer.java:724) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.applyMixins(MixinTransformer.java:703) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:509) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).jar:?]
at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72) ~[More-Planets-1.12.2-2.1.12-GC251%20(1).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(Unknown Source) ~[?:1.8.0_251]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
at net.minecraft.client.main.Main.main(SourceFile:38) ~[Main.class:?]
... 6 more
[13:19:16] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:-1]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[13:19:16] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:-1]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[13:19:16] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.SecurityManager.checkExit(Unknown Source)
[13:19:16] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.Runtime.exit(Unknown Source)
[13:19:16] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.System.exit(Unknown Source)
[13:19:16] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:-1]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
[13:19:16] [main/INFO]: [java.lang.ThreadGroup:uncaughtException:-1]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

BTW, it's not sound issue. It is mixin. I'm gonna do it on my side.

What does that mean? Sorry if I sound rude

For simple it's a bug.
So please try with this file
https://www.dropbox.com/s/rlr4ykfm0tnvyrs/SteveKunG%27s-Lib-1.12.2-1.1.5.jar?dl=1

Hmm, still dont hear anything.

Then it's other mods issue, Also any additional full log?

Theres another log file but it looks like complete gibberish

Its called 2020-05-27-1.log.gz

Or do you want me to show you the log that I used before, it might be updated to the mod that you sent me.

Yes sure but upload it to pastebin or hastebin

ok here you go

https://pastebin.com/CLnysuNr

Found a problem. More detail at : https://bugs.mojang.com/browse/MC-9974

Wow, all I had to do was press F3 and T, thanks dude your the best.

That fix saved me from starting from scratch on my modpack!

No problem, you bring a new issue that I haven't found it.
Also published new version on curseforge

Thanks!