Hello, I recently started modding but I have experience coding plugins for servers. I have found a tiny error that stops the game from launching. I am using the latest version of forge MDK (12.18.3.2511) and have jdk1.8.0_151 (64 bit) installed and am using eclipse Java Oxygen.

Here is the code to my main class:

package me.jamie.modpackage;

import me.jamie.modpackage.item.ModItems;
import me.jamie.modpackage.proxy.CommonProxy;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.SidedProxy;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;

@Mod(modid = MP.modid, name = MP.name, version = MP.ver, acceptedMinecraftVersions = "[1.10.2]")
public class MP {
	
	public static final String modid = "mods";
	public static final String name = "jamies mod package";
	public static final String ver = "0.1";	

	@Mod.Instance(MP.modid)
	public static MP instance;
	
	@Mod.EventHandler
	public void preInit(FMLPreInitializationEvent e) {
		ModItems.init();
	}
	@Mod.EventHandler
	public void init(FMLInitializationEvent e) {
		
	}
	@Mod.EventHandler
	public void postInit(FMLPostInitializationEvent e) {
		
	}
	@SidedProxy(serverSide = "me.jamie.modpackage.proxy.CommonProxy", clientSide = "me.jamie.modpackage.proxy.ClientProxy")
	public static CommonProxy proxy;
}

Here is the error:

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 29/10/17 6:04 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 jamies mod package (mods)
Caused by: net.minecraftforge.fml.common.LoaderException: net.minecraftforge.fml.common.LoaderException: Attempted to load a proxy type me.jamie.modpackage.proxy.ClientProxy into me.jamie.modpackage.MP.proxy, but the types don't match
	at net.minecraftforge.fml.common.ProxyInjector.inject(ProxyInjector.java:88)
	at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:595)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
	at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
	at com.google.common.eventbus.EventBus.post(EventBus.java:275)
	at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:243)
	at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:221)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
	at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
	at com.google.common.eventbus.EventBus.post(EventBus.java:275)
	at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:145)
	at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:559)
	at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:220)
	at net.minecraft.client.Minecraft.startGame(Minecraft.java:477)
	at net.minecraft.client.Minecraft.run(Minecraft.java:386)
	at net.minecraft.client.main.Main.main(Main.java:118)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
	at GradleStart.main(GradleStart.java:26)
Caused by: net.minecraftforge.fml.common.LoaderException: Attempted to load a proxy type me.jamie.modpackage.proxy.ClientProxy into me.jamie.modpackage.MP.proxy, but the types don't match
	at net.minecraftforge.fml.common.ProxyInjector.inject(ProxyInjector.java:81)
	... 39 more


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

-- System Details --
Details:
	Minecraft Version: 1.10.2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_151, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1787415016 bytes (1704 MB) / 2112618496 bytes (2014 MB) up to 2112618496 bytes (2014 MB)
	JVM Flags: 3 total; -Xincgc -Xmx2048M -Xms2048M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP 9.32 Powered by Forge 12.18.3.2511 4 mods loaded, 4 mods active
	States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
	UC	mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
	UC	FML{8.0.99.99} [Forge Mod Loader] (forgeSrc-1.10.2-12.18.3.2511.jar) 
	UC	Forge{12.18.3.2511} [Minecraft Forge] (forgeSrc-1.10.2-12.18.3.2511.jar) 
	UE	mods{0.1} [jamies mod package] (bin) 
	Loaded coremods (and transformers): 
	GL info: ' Vendor: 'ATI Technologies Inc.' Version: '4.5.13492 Compatibility Profile Context 22.19.677.257' Renderer: 'AMD Radeon (TM) R9 380 Series'

If anyone has a simple solution to this that would be greatly appreciated. A solution I found was to change the modid so it is all lowercase, but my modid already is.

Thanks.

It's telling you there's a problem with your proxy classes.

Ohhh ok thank you very much I didn't see that for some reason