Describe the bug
Hit play on the Minecraft Launcher and it minimizes. Comes right back up with an error code saying the game crashed. Minecraft doesn't even open the FML loading screen.

To Reproduce
Steps to reproduce the behavior:
I'm unsure how to reproduce what exactly is causing this issue. I've got a lot of mods, but the game isn't even starting. I hit play and a few seconds after it just crashes. If you need more information outside the crash log let me know and I will do what I can to get you the info.

Crash Log
Mixin prepare failed preparing MixinGuiScreen in fancymenu.general.mixin.json: org.spongepowered.asm.mixin.transformer.throwables.MixinTargetAlreadyLoadedException Critical problem: fancymenu.general.mixin.json:MixinGuiScreen target net.minecraft.client.gui.GuiScreen was loaded too early. org.spongepowered.asm.mixin.transformer.throwables.MixinTargetAlreadyLoadedException: Critical problem: fancymenu.general.mixin.json:MixinGuiScreen target net.minecraft.client.gui.GuiScreen was loaded too early. at org.spongepowered.asm.mixin.transformer.MixinInfo.readDeclaredTargets(MixinInfo.java:937) at org.spongepowered.asm.mixin.transformer.MixinInfo.<init>(MixinInfo.java:871) at org.spongepowered.asm.mixin.transformer.MixinConfig.prepareMixins(MixinConfig.java:713) at org.spongepowered.asm.mixin.transformer.MixinConfig.prepare(MixinConfig.java:650) at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:515) at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:440) at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:416) at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:285) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:191) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:178) at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72) at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at net.minecraft.launchwrapper.Launch.launch(Launch.java:131) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) 19:09:05.794 LaunchWrapper main Unable to launch java.lang.ClassNotFoundException: net.minecraft.client.main.Main at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at net.minecraft.launchwrapper.Launch.launch(Launch.java:131) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [fancymenu.general.mixin.json:MixinGuiScreen] from phase [DEFAULT] in config [fancymenu.general.mixin.json] FAILED during PREPARE at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinError(MixinProcessor.java:643) at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinPrepareError(MixinProcessor.java:591) at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:518) at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:440) at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:416) at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:285) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:191) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:178) at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72) at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ... 6 more Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTargetAlreadyLoadedException: Critical problem: fancymenu.general.mixin.json:MixinGuiScreen target net.minecraft.client.gui.GuiScreen was loaded too early. at org.spongepowered.asm.mixin.transformer.MixinInfo.readDeclaredTargets(MixinInfo.java:937) at org.spongepowered.asm.mixin.transformer.MixinInfo.<init>(MixinInfo.java:871) at org.spongepowered.asm.mixin.transformer.MixinConfig.prepareMixins(MixinConfig.java:713) at org.spongepowered.asm.mixin.transformer.MixinConfig.prepare(MixinConfig.java:650) at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:515) ... 14 more

Basic Informations (please complete the following information):

• OS: Windows
• FancyMenu Version [2.0.6-1.12-1.12.2]
• Forge/Fabric Version [14.23.5.2854]
• Minecraft Version [1.12.2]
• Active Mods [138 Mods, can post list if needed.]

Hi! Most probably a mod conflict, not FM's fault.
Try to load the game with only FancyMenu, Konkrete and MixinBootstrap installed, please.

It launches normally with just those installed plus Optifine. Would you like me to send my modlist or do you know of any conflicting mods already?

There are some incompatible mods listed in this incompatibility list.

I don’t really have time to check all your mods, that’s the problem :/

But you can send me a full log (located at .minecraft/logs/latest.log) with all mods installed (should show the error), if you want. Maybe I can find something Mixin related or core mod related there. The incompatibility is either caused by another mod using Mixin or a core mod.