[12:20:58] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
	at com.mrcrayfish.furniture.proxy.CommonProxy.isDedicatedServer(CommonProxy.java:50) ~[CommonProxy.class:?]
	at com.mrcrayfish.furniture.handler.SyncEvent.onPlayerLogin(SyncEvent.java:33) ~[SyncEvent.class:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_58_SyncEvent_onPlayerLogin_PlayerLoggedInEvent.invoke(.dynamic) ~[?:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?]
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185) ~[EventBus.class:?]
	at net.minecraftforge.fml.common.FMLCommonHandler.firePlayerLoggedIn(FMLCommonHandler.java:566) ~[FMLCommonHandler.class:?]
	at net.minecraft.server.management.PlayerList.initializeConnectionToPlayer(PlayerList.java:214) ~[mt.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:262) ~[NetworkDispatcher.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.access$100(NetworkDispatcher.java:73) ~[NetworkDispatcher.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:211) ~[NetworkDispatcher$1.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:287) ~[er.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180) ~[mh.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:743) ~[MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:384) ~[lh.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:624) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_101]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_101]
	... 17 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@2f17e30d from coremod FMLCorePlugin
	at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:253) ~[minecraft_server.jar:?]
	at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_101]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_101]
	... 17 more
Caused by: java.lang.RuntimeException: Attempted to load class bes for invalid side SERVER
	at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:56) ~[minecraft_server.jar:?]
	at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:249) ~[minecraft_server.jar:?]
	at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_101]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_101]
	... 17 more