Server Crash

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 7/2/19 9:11 AM
Description: Ticking player

java.lang.IllegalAccessError: tried to access method vazkii.botania.common.item.equipment.bauble.ItemFlightTiara.shouldPlayerHaveFlight(Lnet/minecraft/entity/player/EntityPlayer;)Z from class alfheim.common.core.handler.EventHandler
	at alfheim.common.core.handler.EventHandler.onPlayerUpdate(EventHandler.kt:362)
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_208_EventHandler_onPlayerUpdate_PlayerTickEvent.invoke(.dynamic)
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
	at cpw.mods.fml.common.FMLCommonHandler.onPlayerPostTick(FMLCommonHandler.java:350)
	at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:353)
	at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:295)
	at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:303)
	at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(SourceFile:137)
	at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(SourceFile:8)
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:186)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:396)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at alfheim.common.core.handler.EventHandler.onPlayerUpdate(EventHandler.kt:362)
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_208_EventHandler_onPlayerUpdate_PlayerTickEvent.invoke(.dynamic)
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
	at cpw.mods.fml.common.FMLCommonHandler.onPlayerPostTick(FMLCommonHandler.java:350)
	at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:353)
	at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:295)

-- Player being ticked --
Details:
	Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)
	Entity ID: 452
	Entity Name: Gedeon_Grays
	Entity's Exact location: -1003.35, 77.00, 185.50
	Entity's Block location: World: (-1004,77,185), Chunk: (at 4,4,9 in -63,11; contains blocks -1008,0,176 to -993,255,191), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
	Entity's Momentum: 0.00, -0.08, 0.00
Stacktrace:
	at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:303)
	at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(SourceFile:137)
	at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(SourceFile:8)
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)

-- Ticking connection --
Details:
	Connection: net.minecraft.network.NetworkManager@6a8b5c86
Stacktrace:
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:186)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:396)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)