I have had Minecraft forge 1.12.2 for quite some time. I haven't played for a while and now when I try to load the game it crashes. Can someone please help me? Also, I tried to take out Obfuscate and Minecraft loaded but it said obfuscate is required for the Mr. Crayfish mods I have, but when I put it back in the crash report appears again and it crashes. I'm not sure how to get the crash report but I think this is it.

 

---- Minecraft Crash Report ----

WARNING: coremods are present:
  ObfuscatePlugin (obfuscate-0.2.5-1.12.2.jar)
Contact their authors BEFORE contacting forge

// Don't be sad, have a hug! ❤️

Time: 2/10/19 12:11 PM
Description: Initializing game

java.lang.NoClassDefFoundError: com/mia/craftstudio/IPackReaderCallback
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:528)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:218)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:135)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:593)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:225)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: com.mia.craftstudio.IPackReaderCallback
    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)
    ... 39 more
Caused by: java.lang.NullPointerException
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
    ... 41 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:528)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:218)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:135)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:593)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:225)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Mac OS X (x86_64) version 10.13.6
    Java Version: 1.8.0_74, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 659905200 bytes (629 MB) / 1140850688 bytes (1088 MB) up to 2147483648 bytes (2048 MB)
    JVM Flags: 7 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.4.2705 28 mods loaded, 28 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State | ID                  | Version           | Source                                | Signature                                |
    |:----- |:------------------- |:----------------- |:------------------------------------- |:---------------------------------------- |
    | UC    | minecraft           | 1.12.2            | minecraft.jar                         | None                                     |
    | UC    | mcp                 | 9.42              | minecraft.jar                         | None                                     |
    | UC    | FML                 | 8.0.99.99         | forge-1.12.2-14.23.4.2705.jar         | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UC    | forge               | 14.23.4.2705      | forge-1.12.2-14.23.4.2705.jar         | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UC    | obfuscate           | 0.2.5             | minecraft.jar                         | None                                     |
    | UC    | securitycraft       | v1.8.6            | [1.12.x]+SecurityCraft+v1.8.6.jar     | None                                     |
    | UC    | cgm                 | 0.4.0             | cgm-0.4.0-mc1.12.2.jar                | None                                     |
    | UC    | cucumber            | 1.1.1             | Cucumber-1.12.2-1.1.1.jar             | None                                     |
    | U     | props               | 2.6.0             | Decocraft-2.6.0_1.12.2.jar            | None                                     |
    | U     | flansmod            | 5.5.2             | Flan's Mod-1.12.2-5.5.2.jar           | None                                     |
    | U     | flansmodapocalypse  | 1.0               | Flan's Mod-1.12.2-5.5.2.jar           | None                                     |
    | U     | cfm                 | 5.4.1             | furniture-5.4.1-1.12.2.jar            | None                                     |
    | U     | ichunutil           | 7.1.4             | iChunUtil-1.12.2-7.1.4.jar            | None                                     |
    | U     | ironchest           | 1.12.2-7.0.46.831 | ironchest-1.12.2-7.0.46.831.jar       | None                                     |
    | U     | jei                 | 4.11.0.202        | jei_1.12.2-4.11.0.202 (1).jar         | None                                     |
    | U     | journeymap          | 1.12.2-5.5.2      | journeymap-1.12.2-5.5.2.jar           | None                                     |
    | U     | mantle              | 1.12-1.3.2.24     | Mantle-1.12-1.3.2.24.jar              | None                                     |
    | U     | radixcore           | 1.12.x-2.2.1      | RadixCore-1.12.x-2.2.1-universal.jar  | None                                     |
    | U     | mca                 | 1.12.2-5.3.1      | MCA-1.12.x-5.3.1-universal.jar        | None                                     |
    | U     | morph               | 7.1.2             | Morph-1.12.2-7.1.2 (1).jar            | None                                     |
    | U     | mysticalagriculture | 1.6.12            | mysticalagriculture-1.12-1.6.12.jar   | None                                     |
    | U     | harvestcraft        | 1.12.2u           | Pam's+HarvestCraft+1.12.2u.jar        | None                                     |
    | U     | vampirism           | 1.4.3             | Vampirism-1.12.2-1.4.3 (1).jar        | None                                     |
    | U     | teamlapen-lib       | 1.4.3             | Vampirism-1.12.2-1.4.3 (1).jar        | None                                     |
    | U     | vehicle             | 0.19.1            | vehicle-mod-0.19.1-1.12.2.jar         | None                                     |
    | U     | veinminer           | 0.38.1            | VeinMiner-1.12-0.38.1.639+134fb1e.jar | None                                     |
    | U     | veinminermodsupport | 0.38.1            | VeinMiner-1.12-0.38.1.639+134fb1e.jar | None                                     |
    | U     | worldedit           | 6.1.8             | worldedit-forge-mc1.12-6.1.8-dist.jar | None                                     |

    Loaded coremods (and transformers): 
ObfuscatePlugin (obfuscate-0.2.5-1.12.2.jar)
  com.mrcrayfish.obfuscate.asm.ObfuscateTransformer
    GL info: ' Vendor: 'Intel Inc.' Version: '2.1 INTEL-10.36.22' Renderer: 'Intel HD Graphics 4000 OpenGL Engine'
    Launched Version: 1.12.2-forge1.12.2-14.23.4.2705
    LWJGL: 2.9.2
    OpenGL: Intel HD Graphics 4000 OpenGL Engine GL version 2.1 INTEL-10.36.22, Intel Inc.
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: 
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 4x Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz

Ok, thank you! I'll see if that helps thank you!

 

Thank you so much! It's working now. I feel kind of stupid but thank you for your help!