Hello,
Today I decided to run Malis doors mod (and Malis Core mod) on a Minecraft instance and this was the error:
MultiMC version: 0.6.11-1370

Minecraft folder is:
/Applications/MultiMC.app/Contents/MacOS/instances/City of Lorensis/.minecraft

Java path is:
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java

Java is version 1.8.0_241, using 64-bit architecture.

Main Class:
net.minecraft.launchwrapper.Launch

Native path:
/Applications/MultiMC.app/Contents/MacOS/instances/City of Lorensis/natives

Libraries:
/Applications/MultiMC.app/Contents/MacOS/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/lwjgl/lwjgl/lwjgl/2.9.4-nightly-20150209/lwjgl-2.9.4-nightly-20150209.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/lwjgl/lwjgl/lwjgl_util/2.9.4-nightly-20150209/lwjgl_util-2.9.4-nightly-20150209.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/mojang/patchy/1.1/patchy-1.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/oshi-project/oshi-core/1.1/oshi-core-1.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/net/java/dev/jna/platform/3.4.0/platform-3.4.0.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/net/sf/jopt-simple/jopt-simple/5.0.3/jopt-simple-5.0.3.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/paulscode/codecjorbis/20101023/codecjorbis-20101023.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/paulscode/codecwav/20101023/codecwav-20101023.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/paulscode/libraryjavasound/20101123/libraryjavasound-20101123.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/paulscode/librarylwjglopenal/20100824/librarylwjglopenal-20100824.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/paulscode/soundsystem/20120107/soundsystem-20120107.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/io/netty/netty-all/4.1.9.Final/netty-all-4.1.9.Final.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/google/guava/guava/21.0/guava-21.0.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/apache/commons/commons-lang3/3.5/commons-lang3-3.5.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/commons-io/commons-io/2.5/commons-io-2.5.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/commons-codec/commons-codec/1.10/commons-codec-1.10.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/google/code/gson/gson/2.8.0/gson-2.8.0.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/mojang/authlib/1.5.25/authlib-1.5.25.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/mojang/realms/1.10.22/realms-1.10.22.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/apache/commons/commons-compress/1.8.1/commons-compress-1.8.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/it/unimi/dsi/fastutil/7.1.0/fastutil-7.1.0.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/apache/logging/log4j/log4j-api/2.8.1/log4j-api-2.8.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/apache/logging/log4j/log4j-core/2.8.1/log4j-core-2.8.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/mojang/text2speech/1.10.3/text2speech-1.10.3.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/ca/weblite/java-objc-bridge/1.0.0/java-objc-bridge-1.0.0.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/net/minecraftforge/forge/1.12.2-14.23.5.2854/forge-1.12.2-14.23.5.2854-universal.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/ow2/asm/asm-debug-all/5.2/asm-debug-all-5.2.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/net/minecraft/launchwrapper/1.12/launchwrapper-1.12.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/jline/jline/3.5.1/jline-3.5.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/typesafe/akka/akka-actor_2.11/2.3.3/akka-actor_2.11-2.3.3.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/typesafe/config/1.2.1/config-1.2.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/scala-actors-migration_2.11/1.1.0/scala-actors-migration_2.11-1.1.0.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/scala-compiler/2.11.1/scala-compiler-2.11.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/plugins/scala-continuations-library_2.11/1.0.2_mc/scala-continuations-library_2.11-1.0.2_mc.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/plugins/scala-continuations-plugin_2.11.1/1.0.2_mc/scala-continuations-plugin_2.11.1-1.0.2_mc.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/scala-library/2.11.1/scala-library-2.11.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/scala-parser-combinators_2.11/1.0.1/scala-parser-combinators_2.11-1.0.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/scala-reflect/2.11.1/scala-reflect-2.11.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/scala-swing_2.11/1.0.1/scala-swing_2.11-1.0.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/scala-lang/scala-xml_2.11/1.0.2/scala-xml_2.11-1.0.2.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/lzma/lzma/0.0.1/lzma-0.0.1.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/java3d/vecmath/1.5.2/vecmath-1.5.2.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/net/sf/trove4j/trove4j/3.0.3/trove4j-3.0.3.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/apache/maven/maven-artifact/3.5.3/maven-artifact-3.5.3.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/com/mojang/minecraft/1.12.2/minecraft-1.12.2-client.jar

Native libraries:
/Applications/MultiMC.app/Contents/MacOS/libraries/net/java/jinput/jinput-platform/2.0.5/jinput-platform-2.0.5-natives-osx.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/org/lwjgl/lwjgl/lwjgl-platform/2.9.4-nightly-20150209/lwjgl-platform-2.9.4-nightly-20150209-natives-osx.jar
/Applications/MultiMC.app/Contents/MacOS/libraries/ca/weblite/java-objc-bridge/1.0.0/java-objc-bridge-1.0.0-natives-osx.jar

Mods:
[✔️] AdChimneys-1.12.2-3.5.13.0-build.0471
[✔️] AutoRegLib-1.3-32
[✔️] Baubles-1.12-1.5.2
[✔️] Botania r1.10-363
[❌] CarryOn MC1.12.2 v1.12.3.jar (disabled)
[✔️] Chameleon-1.12-4.1.3
[✔️] cjcm-1.0
[✔️] CoroUtil-1.12.2
[✔️] CustomNPCs_1.12.2-(01Oct19)
[✔️] Decocraft-2.6.3_1.12.2
[✔️] ElevatorMod-1.12.2-1.3.14
[✔️] ForgeEndertech-1.12.2-4.5.2.0-build.0459
[✔️] furniture-6.3.1-1.12.2
[✔️] guns-0.15.3-1.12.2
[✔️] inventorypets-1.12-2.0.5
[✔️] MalisisCore-1.12.2
[✔️] malisisdoors-1.12.2-7.3.0
[✔️] modnametooltip_1.12.2-1.10.1
[✔️] obfuscate-0.4.2-1.12.2
[✔️] OpenBlocks-1.12.2-1.8.1
[✔️] OpenModsLib-1.12.2-0.12.2
[✔️] OptiFine_1.12.2_HD_U_F5
[✔️] Pam's HarvestCraft 1.12.2zg
[✔️] Placebo-1.12.2-1.6.0
[✔️] PTRLib-1.0.4
[✔️] Quark-r1.6-179
[✔️] RedstoneFlux-1.12-2.1.1.1-universal
[✔️] SimplyJetpacks2-1.12.2-2.2.14.67
[✔️] StorageDrawers-1.12.2-5.4.2
[✔️] Toast Control-1.12.2-1.8.1
[✔️] VanillaFix-1.0.10-150
[✔️] vehicle-mod-0.43.5-1.12.2
[✔️] Weather-Storms-Tornadoes-Mod-1.12.2
[✔️] Xaeros_Minimap_20.9.0_Forge_1.12

Params:
--username --version MultiMC5 --gameDir /Applications/MultiMC.app/Contents/MacOS/instances/City of Lorensis/.minecraft --assetsDir /Applications/MultiMC.app/Contents/MacOS/assets --assetIndex 1.12 --uuid --accessToken --userType --versionType release --tweakClass net.minecraftforge.fml.common.launcher.FMLTweaker

Window size: 854 x 480

Java Arguments:
[-Xdock:icon=icon.png, -Xdock:name="MultiMC: City of Lorensis", -Xms1280m, -Xmx2816m, -Duser.language=en]

Minecraft process ID: 3757

Using onesix launcher.

[14:15:28] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[14:15:28] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[14:15:28] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[14:15:28] [main/INFO] [FML]: Forge Mod Loader version 14.23.5.2854 for Minecraft 1.12.2 loading
[14:15:28] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_241, running on Mac OS X:x86_64:10.15.3, installed at /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
[14:15:28] [main/INFO] [FML]: Searching /Applications/MultiMC.app/Contents/MacOS/instances/City of Lorensis/.minecraft/mods for mods
[14:15:28] [main/WARN] [FML]: Found FMLCorePluginContainsFMLMod marker in AdChimneys-1.12.2-3.5.13.0-build.0471.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[14:15:28] [main/WARN] [FML]: The coremod com.endertech.minecraft.mods.adchimneys.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:15:28] [main/WARN] [FML]: The coremod LoadingPlugin (com.endertech.minecraft.mods.adchimneys.LoadingPlugin) is not signed!
[14:15:28] [main/WARN] [FML]: Found FMLCorePluginContainsFMLMod marker in ForgeEndertech-1.12.2-4.5.2.0-build.0459.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[14:15:28] [main/WARN] [FML]: The coremod com.endertech.minecraft.forge.coremod.CorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:15:28] [main/WARN] [FML]: The coremod CorePlugin (com.endertech.minecraft.forge.coremod.CorePlugin) is not signed!
[14:15:28] [main/INFO] [FML]: Loading tweaker org.spongepowered.asm.launch.MixinTweaker from MalisisCore-1.12.2.jar
[14:15:28] [main/WARN] [FML]: The coremod ObfuscatePlugin (com.mrcrayfish.obfuscate.asm.ObfuscatePlugin) is not signed!
[14:15:28] [main/WARN] [FML]: Found FMLCorePluginContainsFMLMod marker in OpenModsLib-1.12.2-0.12.2.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[14:15:28] [main/WARN] [FML]: The coremod openmods.core.OpenModsCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:15:28] [main/INFO] [FML]: Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.12.2_HD_U_F5.jar
[14:15:28] [main/WARN] [FML]: Found FMLCorePluginContainsFMLMod marker in Quark-r1.6-179.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[14:15:28] [main/WARN] [FML]: The coremod Quark Plugin (vazkii.quark.base.asm.LoadingPlugin) is not signed!
[14:15:28] [main/INFO] [FML]: Loading tweaker org.spongepowered.asm.launch.MixinTweaker from VanillaFix-1.0.10-150.jar
[14:15:28] [main/WARN] [FML]: Found FMLCorePluginContainsFMLMod marker in Xaeros_Minimap_20.9.0_Forge_1.12.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[14:15:28] [main/WARN] [FML]: The coremod LoadingPlugin (xaero.common.core.LoadingPlugin) is not signed!
[14:15:28] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[14:15:28] [main/INFO] [LaunchWrapper]: Loading tweak class name org.spongepowered.asm.launch.MixinTweaker
[14:15:28] [main/ERROR] [mixin]: Catching
org.spongepowered.asm.service.ServiceInitialisationException: ModLauncher is not available
at org.spongepowered.asm.service.modlauncher.MixinServiceModLauncherBootstrap.bootstrap(MixinServiceModLauncherBootstrap.java:52) ~[VanillaFix-1.0.10-150.jar:?]
at org.spongepowered.asm.service.MixinService.runBootServices(MixinService.java:79) [MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.service.MixinService.(MixinService.java:72) [MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.service.MixinService.getInstance(MixinService.java:92) [MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.service.MixinService.boot(MixinService.java:102) [MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.launch.MixinBootstrap.(MixinBootstrap.java:76) [MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.launch.MixinTweaker.(MixinTweaker.java:44) [MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_241]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) [?:1.8.0_241]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:1.8.0_241]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) [?:1.8.0_241]
at java.lang.Class.newInstance(Class.java:442) [?:1.8.0_241]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:98) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_241]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_241]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_241]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_241]
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196) [NewLaunch.jar:?]
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231) [NewLaunch.jar:?]
at org.multimc.EntryPoint.listen(EntryPoint.java:143) [NewLaunch.jar:?]
at org.multimc.EntryPoint.main(EntryPoint.java:34) [NewLaunch.jar:?]
[14:15:28] [main/INFO] [mixin]: SpongePowered MIXIN Subsystem Version=0.7.11 Source=file:/Applications/MultiMC.app/Contents/MacOS/instances/City%20of%20Lorensis/.minecraft/mods/MalisisCore-1.12.2.jar Service=LaunchWrapper Env=CLIENT
[14:15:28] [main/WARN] [FML]: The coremod net.malisis.core.asm.MalisisCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:15:28] [main/WARN] [FML]: The coremod MalisisCorePlugin (net.malisis.core.asm.MalisisCorePlugin) is not signed!
[14:15:28] [main/INFO] [mixin]: Compatibility level set to JAVA_8
[14:15:28] [main/INFO] [VanillaFix]: Initializing VanillaFix
[14:15:28] [main/INFO] [VanillaFix]: Initializing StacktraceDeobfuscator
[14:15:28] [main/INFO] [VanillaFix]: Found MCP method mappings: methods-stable_39.csv
[14:15:28] [main/INFO] [VanillaFix]: Done initializing StacktraceDeobfuscator
[14:15:28] [main/INFO] [VanillaFix]: Initializing Bug Fix Mixins
[14:15:28] [main/INFO] [VanillaFix]: Initializing Crash Fix Mixins
[14:15:28] [main/INFO] [VanillaFix]: Initializing Profiler Improvement Mixins
[14:15:28] [main/INFO] [VanillaFix]: Initializing Texture Fix Mixins
[14:15:28] [main/INFO] [VanillaFix]: Initializing Mod Support Mixins
[14:15:28] [main/WARN] [FML]: The coremod VanillaFixLoadingPlugin (org.dimdev.vanillafix.VanillaFixLoadingPlugin) is not signed!
[14:15:28] [main/INFO] [LaunchWrapper]: Loading tweak class name optifine.OptiFineForgeTweaker
[14:15:28] [main/WARN] [LaunchWrapper]: Tweak class name org.spongepowered.asm.launch.MixinTweaker has already been visited -- skipping
[14:15:28] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[14:15:28] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[14:15:28] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[14:15:28] [main/INFO] [LaunchWrapper]: Calling tweak class optifine.OptiFineForgeTweaker
[14:15:28] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:56]: OptiFineForgeTweaker: acceptOptions
[14:15:28] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:56]: OptiFineForgeTweaker: injectIntoClassLoader
[14:15:28] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:242]: OptiFine ClassTransformer
[14:15:28] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:242]: OptiFine ZIP file: /Applications/MultiMC.app/Contents/MacOS/instances/City of Lorensis/.minecraft/mods/OptiFine_1.12.2_HD_U_F5.jar
[14:15:28] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[14:15:30] [main/INFO] [FML]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
[14:15:30] [main/INFO] [FML]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[14:15:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[14:15:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[14:15:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[14:15:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[14:15:30] [main/INFO] [LaunchWrapper]: Calling tweak class org.spongepowered.asm.launch.MixinTweaker
[14:15:30] [main/INFO] [mixin]: Initialised Mixin FML Remapper Adapter with net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper@4f4c789f
[14:15:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[14:15:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: java.lang.AbstractMethodError: org.dimdev.vanillafix.ModCompatibilityMixinPlugin.preApply(Ljava/lang/String;Lorg/spongepowered/asm/lib/tree/ClassNode;Ljava/lang/String;Lorg/spongepowered/asm/mixin/extensibility/IMixinInfo;)V
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinInfo.preApply(MixinInfo.java:1212)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinTargetContext.preApply(MixinTargetContext.java:1126)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:274)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:353)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.apply(MixinTransformer.java:724)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.applyMixins(MixinTransformer.java:703)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:509)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at java.lang.Class.forName0(Native Method)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at java.lang.Class.forName(Class.java:348)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraftforge.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:56)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at java.lang.reflect.Method.invoke(Method.java:498)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.multimc.EntryPoint.listen(EntryPoint.java:143)
[14:15:30] [main/INFO] [STDERR]: [org.spongepowered.asm.mixin.transformer.MixinTransformer:transformClassBytes:519]: at org.multimc.EntryPoint.main(EntryPoint.java:34)
[14:15:30] [main/FATAL] [FML]: A CRITICAL PROBLEM OCCURRED INITIALIZING MINECRAFT - LIKELY YOU HAVE AN INCORRECT VERSION FOR THIS FML
[14:15:30] [main/ERROR] [LaunchWrapper]: Unable to launch
java.lang.RuntimeException: java.lang.ClassNotFoundException: net.minecraftforge.fml.common.Loader
at net.minecraftforge.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:67) ~[forge-1.12.2-14.23.5.2854-universal.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:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_241]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_241]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_241]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_241]
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196) [NewLaunch.jar:?]
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231) [NewLaunch.jar:?]
at org.multimc.EntryPoint.listen(EntryPoint.java:143) [NewLaunch.jar:?]
at org.multimc.EntryPoint.main(EntryPoint.java:34) [NewLaunch.jar:?]
Caused by: java.lang.ClassNotFoundException: net.minecraftforge.fml.common.Loader
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_241]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_241]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_241]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_241]
at net.minecraftforge.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:56) ~[forge-1.12.2-14.23.5.2854-universal.jar:?]
... 10 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) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
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:418) ~[?:1.8.0_241]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_241]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_241]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_241]
at net.minecraftforge.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:56) ~[forge-1.12.2-14.23.5.2854-universal.jar:?]
... 10 more
Caused by: java.lang.AbstractMethodError: org.dimdev.vanillafix.ModCompatibilityMixinPlugin.preApply(Ljava/lang/String;Lorg/spongepowered/asm/lib/tree/ClassNode;Ljava/lang/String;Lorg/spongepowered/asm/mixin/extensibility/IMixinInfo;)V
at org.spongepowered.asm.mixin.transformer.MixinInfo.preApply(MixinInfo.java:1212) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.mixin.transformer.MixinTargetContext.preApply(MixinTargetContext.java:1126) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:274) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:353) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.apply(MixinTransformer.java:724) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.applyMixins(MixinTransformer.java:703) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:509) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72) ~[MalisisCore-1.12.2.jar:1.12.2-6.5.1-SNAPSHOT]
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:418) ~[?:1.8.0_241]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_241]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_241]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_241]
at net.minecraftforge.fml.common.launcher.FMLDeobfTweaker.injectIntoClassLoader(FMLDeobfTweaker.java:56) ~[forge-1.12.2-14.23.5.2854-universal.jar:?]
... 10 more
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:199]: Failed to start Minecraft:
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: java.lang.reflect.InvocationTargetException
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at java.lang.reflect.Method.invoke(Method.java:498)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at org.multimc.EntryPoint.listen(EntryPoint.java:143)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at org.multimc.EntryPoint.main(EntryPoint.java:34)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: Caused by: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at java.lang.Runtime.exit(Runtime.java:107)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at java.lang.System.exit(System.java:971)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[14:15:30] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: ... 8 more
[14:15:30] [main/INFO] [STDOUT]: [org.multimc.EntryPoint:main:37]: Exiting with -1
[14:15:30] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[14:15:30] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[14:15:30] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
[14:15:30] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Runtime.exit(Runtime.java:107)
[14:15:30] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.System.exit(System.java:971)
[14:15:30] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at org.multimc.EntryPoint.main(EntryPoint.java:38)
Exception in thread "main"
Process exited with code 1.

Can you please help me with this?

From your quote:

Caused by: java.lang.AbstractMethodError: org.dimdev.vanillafix.ModCompatibilityMixinPlugin.preApply(Ljava/lang/String;Lorg/spongepowered/asm/lib/tree/ClassNode;Ljava/lang/String;Lorg/spongepowered/asm/mixin/extensibility/IMixinInfo;

That's probably your reason. If I had to guess at what it is, it's because you're on a Mac and VanillaFix does some stuff that Macs don't like.