[18:45:12] [Server thread/WARN] [net.minecraft.network.NetworkSystem]: Failed to handle packet for /<insert IP here>
net.minecraft.util.ReportedException: Ticking player
    at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:459) ~[oq.class:?]
    at net.minecraft.network.NetHandlerPlayServer.func_73660_a(NetHandlerPlayServer.java:173) ~[pa.class:?]
    at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:209) ~[NetworkDispatcher$1.class:?]
    at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:285) ~[gw.class:?]
    at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180) [oz.class:?]
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:790) [MinecraftServer.class:?]
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]
Caused by: java.lang.NoSuchMethodError: vazkii.botania.api.mana.IManaDiscountArmor.getDiscount(Lnet/minecraft/item/ItemStack;ILnet/minecraft/entity/player/EntityPlayer;Lnet/minecraft/item/ItemStack;)F
    at vazkii.botania.api.mana.ManaItemHandler.getFullDiscountForTools(ManaItemHandler.java:335) ~[ManaItemHandler.class:?]
    at vazkii.botania.api.mana.ManaItemHandler.requestManaExactForTool(ManaItemHandler.java:316) ~[ManaItemHandler.class:?]
    at vazkii.botania.common.item.equipment.tool.manasteel.ItemManasteelShears.func_77663_a(ItemManasteelShears.java:125) ~[ItemManasteelShears.class:?]
    at net.minecraft.item.ItemStack.func_77945_a(ItemStack.java:526) ~[aip.class:?]
    at net.minecraft.entity.player.InventoryPlayer.func_70429_k(InventoryPlayer.java:363) ~[aec.class:?]
    at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:511) ~[aed.class:?]
    at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2179) ~[vp.class:?]
    at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:234) ~[aed.class:?]
    at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:382) ~[oq.class:?]