The Game Crashes on Startup

[RetroLive]

i have had lots of mods before but this is the first one i get an error for on all versions

LOG

---- Minecraft Crash Report ----

WARNING: coremods are present: Contact their authors BEFORE contacting forge

// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [HUG]

Time: 1/24/19 6:52 PM Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Modular ForceField System (modularforcefieldsystem) Caused by: java.lang.NoClassDefFoundError: com/nekokittygames/mffs/common/guide/LightGuideBook at com.nekokittygames.mffs.common.ModularForceFieldSystem.preInit(ModularForceFieldSystem.java:347) 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:497) at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:624) 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:497) 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$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) at com.google.common.eventbus.EventBus.post(EventBus.java:217) at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219) at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) at com.google.common.eventbus.Subscriber$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:136) at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:627) at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252) at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467) at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378) 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:497) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) Caused by: java.lang.ClassNotFoundException: com.nekokittygames.mffs.common.guide.LightGuideBook 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) ... 42 more Caused by: java.lang.NoClassDefFoundError: amerifrance/guideapi/api/IGuideBook at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:760) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ... 44 more Caused by: java.lang.ClassNotFoundException: amerifrance.guideapi.api.IGuideBook 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) ... 48 more Caused by: java.lang.NullPointerException at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ... 50 more

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

-- System Details -- Details: Minecraft Version: 1.12.2 Operating System: Windows 7 (amd64) version 6.1 Java Version: 1.8.0_51, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1544967288 bytes (1473 MB) / 2013265920 bytes (1920 MB) up to 3221225472 bytes (3072 MB) JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G -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 14.23.5.2807 Optifine OptiFine_1.12.2_HD_U_E3 5 mods loaded, 5 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                                |
|:----- |:----------------------- |:------------ |:------------------------------------ |:---------------------------------------- |
| LCH   | minecraft               | 1.12.2       | minecraft.jar                        | None                                     |
| LCH   | mcp                     | 9.42         | minecraft.jar                        | None                                     |
| LCH   | FML                     | 8.0.99.99    | forge-1.12.2-14.23.5.2807.jar        | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCH   | forge                   | 14.23.5.2807 | forge-1.12.2-14.23.5.2807.jar        | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCE   | modularforcefieldsystem | 3.0.1        | MFFS-1.12.2-4.0.1.0_1.12_cc3a5aa.jar | None                                     |

Loaded coremods (and transformers): 
GL info: ' Vendor: 'NVIDIA Corporation' Version: '3.3.0' Renderer: 'GeForce 9200M GS/PCIe/SSE2'
OptiFine Version: OptiFine_1.12.2_HD_U_E3
OptiFine Build: 20181210-121000
Render Distance Chunks: 8
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 3.3.0
OpenGlRenderer: GeForce 9200M GS/PCIe/SSE2
OpenGlVendor: NVIDIA Corporation
CpuCount: 4

[Chocohead]

Duplicate of #30 and #35, you need to get Guide-API and Redstone Flux too

[RetroLive]

Thank you so much. It worked