Logs du serveur

net.minecraft.util.ReportedException: Ticking player
	at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:500) ~[EntityPlayerMP.class:?]
	at net.minecraft.network.NetHandlerPlayServer.update(NetHandlerPlayServer.java:185) ~[NetHandlerPlayServer.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.update(NetworkDispatcher.java:212) ~[NetworkDispatcher$1.class:?]
	at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:307) ~[NetworkManager.class:?]
	at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:197) [NetworkSystem.class:?]
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:865) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities(DedicatedServer.java:414) [DedicatedServer.class:?]
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:743) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:592) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_231]
Caused by: java.lang.NoSuchMethodError: net.minecraft.entity.player.InventoryPlayer.armorItemInSlot(I)Lnet/minecraft/item/ItemStack;
	at fr.dodo.rainbow.items.RainbowHelmet.onArmorTick(RainbowHelmet.java:28) ~[RainbowHelmet.class:?]
	at net.minecraft.entity.player.InventoryPlayer.decrementAnimations(InventoryPlayer.java:413) ~[InventoryPlayer.class:?]
	at net.minecraft.entity.player.EntityPlayer.onLivingUpdate(EntityPlayer.java:575) ~[EntityPlayer.class:?]
	at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2396) ~[EntityLivingBase.class:?]
	at net.minecraft.entity.player.EntityPlayer.onUpdate(EntityPlayer.java:272) ~[EntityPlayer.class:?]
	at net.minecraft.entity.player.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:423) ~[EntityPlayerMP.class:?]
	... 9 more
[17:11:48] [Server thread/INFO] [net.minecraft.network.NetHandlerPlayServer]: Dodo_Dev lost connection: Internal server error
[17:11:48] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Dodo_Dev left the game