Как одеваешь ранец.
[16:42:00] [Server thread/WARN]: Failed to handle packet for /178.251.104.38:50419
net.minecraft.util.ReportedException: Ticking player
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:464) ~[mw.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:482) ~[nh.class:?]
at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(C03PacketPlayer.java:36) ~[jd.class:?]
at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(C03PacketPlayer.java:101) ~[jd.class:?]
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245) ~[ej.class:?]
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [nc.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:991) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:431) [lt.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:809) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:669) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at galaxyspace.SolarSystem.planets.overworld.armor.ItemJetPack.onArmorTick(Unknown Source) ~[ItemJetPack.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_70429_k(InventoryPlayer.java:394) ~[yx.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:620) ~[yz.class:?]
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1899) ~[sv.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:315) ~[yz.class:?]
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:393) ~[mw.class:?]
... 10 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:107) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_45]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_45]
at galaxyspace.SolarSystem.planets.overworld.armor.ItemJetPack.onArmorTick(Unknown Source) ~[ItemJetPack.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_70429_k(InventoryPlayer.java:394) ~[yx.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:620) ~[yz.class:?]
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1899) ~[sv.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:315) ~[yz.class:?]
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:393) ~[mw.class:?]
... 10 more
[16:42:00] [Server thread/INFO]: Kela lost connection: Internal server error
[16:42:00] [Server thread/INFO]: Kela left the game.