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Hey guys, please help and if you know what is the problem tell me how I can fix this, Thanks alot!

---- Minecraft Crash Report ----

WARNING: coremods are present:
FMLPlugin (InventoryTweaks-1.60-40.jar)
Java8CheckerCoremod (Pixelmon-1.8.9-4.3.0-beta8-universal.jar)
Contact their authors BEFORE contacting forge

// Hey, that tickles! Hehehe!

Time: 9/17/16 9:43 PM
Description: Updating screen events

io.netty.channel.ChannelException: connection refused
at io.netty.channel.local.LocalChannel$LocalUnsafe.connect(LocalChannel.java:373)
at io.netty.channel.DefaultChannelPipeline$HeadContext.connect(DefaultChannelPipeline.java:1029)
at io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerContext.java:496)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:481)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:463)
at io.netty.channel.DefaultChannelPipeline.connect(DefaultChannelPipeline.java:849)
at io.netty.channel.AbstractChannel.connect(AbstractChannel.java:199)
at io.netty.bootstrap.Bootstrap$2.run(Bootstrap.java:187)
at io.netty.channel.local.LocalEventLoop.run(LocalEventLoop.java:33)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
at java.lang.Thread.run(Thread.java:745)

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

-- Head --
Stacktrace:
at io.netty.channel.local.LocalChannel$LocalUnsafe.connect(LocalChannel.java:373)

-- Affected screen --
Details:
Screen name: net.minecraft.client.gui.GuiMainMenu
Stacktrace:
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1679)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1024)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:349)
at net.minecraft.client.main.Main.main(SourceFile:124)
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: 1.8.9
Operating System: Mac OS X (x86_64) version 10.11.6
CPU: 4x Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 199014568 bytes (189 MB) / 1722286080 bytes (1642 MB) up to 3817865216 bytes (3641 MB)
JVM Flags: 1 total; -Xmx4G
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP 9.19 Powered by Forge 11.15.1.1902 Optifine OptiFine_1.8.9_HD_U_H6 8 mods loaded, 8 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAAA mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAAA FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.1902-1.8.9.jar)
UCHIJAAAAA Forge{11.15.1.1902} [Minecraft Forge] (forge-1.8.9-11.15.1.1902-1.8.9.jar)
UCHIJAAAAA inventorytweaks{1.60-40-e06e29a} [Inventory Tweaks] (InventoryTweaks-1.60-40.jar)
UCHIJAAAAA JEI{2.28.17.185} [Just Enough Items] (Just-Enough-Items-Mod-1.8.9.jar)
UCHIJAAAAA pixelmon{4.3.0-beta8} [Pixelmon] (Pixelmon-1.8.9-4.3.0-beta8-universal.jar)
UCHIJAAAAA VeinMiner{0.34.1_1.8.9-9901a41} [Vein Miner] (VeinMiner-0.34.1-1.8.9r552+9901a41.jar)
UCHIJAAAAA VeinMinerModSupport{0.34.1_1.8.9-9901a41} [Mod Support] (VeinMiner-0.34.1-1.8.9r552+9901a41.jar)
Loaded coremods (and transformers):
FMLPlugin (InventoryTweaks-1.60-40.jar)
invtweaks.forge.asm.ContainerTransformer
Java8CheckerCoremod (Pixelmon-1.8.9-4.3.0-beta8-universal.jar)

Launched Version: 1.8.9-forge1.8.9-11.15.1.1902-1.8.9
LWJGL: 2.9.2
OpenGL: Intel(R) Iris(TM) Graphics 6100 GL version 2.1 INTEL-10.14.73, 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: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: §f§lInFinite 16x §8§l1.8 §6§l[V1.2]
Current Language: English (UK)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz
OptiFine Version: OptiFine_1.8.9_HD_U_H6
Render Distance Chunks: 4
Mipmaps: 0
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 2.1 INTEL-10.14.73
OpenGlRenderer: Intel(R) Iris(TM) Graphics 6100
OpenGlVendor: Intel Inc.
CpuCount: 4