Server Crash

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 6/29/19 3:42 PM
Description: Ticking memory connection

java.lang.NullPointerException: Ticking memory connection
	at alfheim.common.block.tile.TileTradePortal.wrong2DArray(TileTradePortal.kt:210)
	at alfheim.common.block.tile.TileTradePortal.checkMultipleConverters(TileTradePortal.kt:180)
	at alfheim.common.block.tile.TileTradePortal.checkConverter(TileTradePortal.kt:176)
	at alfheim.common.block.tile.TileTradePortal.getValidMetadata(TileTradePortal.kt:38)
	at alfheim.common.block.tile.TileTradePortal.onWanded(TileTradePortal.kt:114)
	at alfheim.common.block.BlockTradePortal.func_149727_a(BlockTradePortal.kt:43)
	at net.minecraft.server.management.ItemInWorldManager.func_73078_a(ItemInWorldManager.java:376)
	at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:556)
	at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60)
	at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9)
	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.block.tile.TileTradePortal.wrong2DArray(TileTradePortal.kt:210)
	at alfheim.common.block.tile.TileTradePortal.checkMultipleConverters(TileTradePortal.kt:180)
	at alfheim.common.block.tile.TileTradePortal.checkConverter(TileTradePortal.kt:176)
	at alfheim.common.block.tile.TileTradePortal.getValidMetadata(TileTradePortal.kt:38)
	at alfheim.common.block.tile.TileTradePortal.onWanded(TileTradePortal.kt:114)
	at alfheim.common.block.BlockTradePortal.func_149727_a(BlockTradePortal.kt:43)
	at net.minecraft.server.management.ItemInWorldManager.func_73078_a(ItemInWorldManager.java:376)
	at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:556)
	at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60)
	at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9)
	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@253cf7a7
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)