Server Crash

---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 7/5/19 10:45 AM
Description: Ticking memory connection

kotlin.TypeCastException: null cannot be cast to non-null type net.minecraft.tileentity.TileEntitySkull
	at alfheim.common.block.BlockFlugelHead.getDrops(BlockFlugelHead.kt:35)
	at net.minecraft.block.Block.func_149690_a(Block.java:655)
	at net.minecraft.block.Block.func_149697_b(Block.java:648)
	at net.minecraft.block.Block.func_149636_a(Block.java:974)
	at net.minecraft.server.management.ItemInWorldManager.func_73084_b(ItemInWorldManager.java:299)
	at net.minecraft.server.management.ItemInWorldManager.func_73082_a(ItemInWorldManager.java:217)
	at net.minecraft.network.NetHandlerPlayServer.func_147345_a(NetHandlerPlayServer.java:498)
	at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:53)
	at net.minecraft.network.play.client.C07PacketPlayerDigging.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)