---- Minecraft Crash Report ----
// But it works on my machine.

Time: 28/02/19 11:34
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiScreen
	at com.tigres810.adventurermod.init.ModItems.<clinit>(ModItems.java:16)
	at com.tigres810.adventurermod.blocks.BlockBase.<init>(BlockBase.java:53)
	at com.tigres810.adventurermod.blocks.machines.BlockEntityFluxGenerator.<init>(BlockEntityFluxGenerator.java:45)
	at com.tigres810.adventurermod.init.ModBlocks.<clinit>(ModBlocks.java:21)
	at com.tigres810.adventurermod.util.handler.RegistryHandler.onBlockRegister(RegistryHandler.java:40)
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_5_RegistryHandler_onBlockRegister_Register.invoke(.dynamic)
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
	at net.minecraftforge.fml.common.eventhandler.EventBus$1.invoke(EventBus.java:144)
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
	at net.minecraftforge.registries.GameData.fireRegistryEvents(GameData.java:777)
	at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:628)
	at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:99)
	at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:333)
	at net.minecraft.server.dedicated.DedicatedServer.init(DedicatedServer.java:128)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:552)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.gui.GuiScreen
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 16 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@cfbc8e8 from coremod FMLCorePlugin
	at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:260)
	at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
	... 18 more
Caused by: java.lang.RuntimeException: Attempted to load class net/minecraft/client/gui/GuiScreen for invalid side SERVER
	at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:62)
	at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256)
	... 20 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 10 (amd64) version 10.0
	Java Version: 1.8.0_202, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 447458712 bytes (426 MB) / 552075264 bytes (526 MB) up to 1900019712 bytes (1812 MB)
	JVM Flags: 0 total;
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP 9.42 Powered by Forge 14.23.5.2768 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 |
	|:----- |:--------- |:------------ |:-------------------------------- |:--------- |
	| UCH   | minecraft | 1.12.2       | minecraft.jar                    | None      |
	| UCH   | mcp       | 9.42         | minecraft.jar                    | None      |
	| UCH   | FML       | 8.0.99.99    | forgeSrc-1.12.2-14.23.5.2768.jar | None      |
	| UCH   | forge     | 14.23.5.2768 | forgeSrc-1.12.2-14.23.5.2768.jar | None      |
	| UCH   | am        | 1.1          | bin                              | None      |

	Loaded coremods (and transformers):
	Profiler Position: N/A (disabled)
	Is Modded: Definitely; Server brand changed to 'fml,forge'
	Type: Dedicated Server (map_server.txt)