---- Minecraft Crash Report ----
// Why is it breaking :(

Time: 2/13/15 5:05 PM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiScreen
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:241)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.gui.GuiScreen
	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)
	... 3 more
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiYesNoCallback
	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)
	... 5 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.gui.GuiYesNoCallback
	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)
	... 9 more
Caused by: java.lang.NullPointerException
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
	... 11 more


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 1.8
	Operating System: Linux (amd64) version 2.6.32-042stab093.4
	Java Version: 1.8.0_31, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 74604784 bytes (71 MB) / 309854208 bytes (295 MB) up to 3817865216 bytes (3641 MB)
	JVM Flags: 1 total; -Xmx4G
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP v9.10 FML v8.0.29.1311 Minecraft Forge 11.14.1.1311 3 mods loaded, 3 mods active
	mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
	FML{8.0.29.1311} [Forge Mod Loader] (forge.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
	Forge{11.14.1.1311} [Minecraft Forge] (forge.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
	Loaded coremods (and transformers):
	Profiler Position: N/A (disabled)
	Player Count: 0 / 20; []
	Is Modded: Definitely; Server brand changed to 'fml,forge'
	Type: Dedicated Server (map_server.txt)