Sending packet

[RageOfFire]

What happened?

I got an error when a player using /premium command they can't login with fastlogin

Steps to reproduce

[05:23:47 WARN]: Failed to handle packet for /x.x.x.x:37679
net.minecraft.server.v1_16_R3.ReportedException: Sending packet
        at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:1911) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.PlayerConnection.sendPacket(PlayerConnection.java:1876) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.PlayerList.a(PlayerList.java:276) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.LoginListener.c(LoginListener.java:190) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.LoginListener.tick(LoginListener.java:87) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.NetworkManager.a(NetworkManager.java:403) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.ServerConnection.c(ServerConnection.java:168) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1520) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:436) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1347) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1135) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:291) ~[patched_1.16.5.jar:git-Paper-794]        at java.lang.Thread.run(Unknown Source) [?:?]
Caused by: java.lang.NullPointerException: type cannot be null
        at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:787) ~[patched_1.16.5.jar:git-Paper-794]
        at com.comphenix.protocol.injector.StructureCache.getStructure(StructureCache.java:138) ~[?:?]
        at com.comphenix.protocol.events.PacketContainer.<init>(PacketContainer.java:126) ~[?:?]
        at com.comphenix.protocol.injector.netty.manager.NetworkManagerInjector.onPacketSending(NetworkManagerInjector.java:96) ~[?:?]
        at com.comphenix.protocol.injector.netty.channel.NettyChannelInjector.processOutbound(NettyChannelInjector.java:553) ~[?:?]
        at com.comphenix.protocol.injector.netty.channel.NettyChannelInjector$2.doProxyRunnable(NettyChannelInjector.java:456) ~[?:?]
        at com.comphenix.protocol.injector.netty.channel.NettyEventLoopProxy.proxyRunnable(NettyEventLoopProxy.java:43) ~[?:?]
        at com.comphenix.protocol.injector.netty.channel.NettyEventLoopProxy.execute(NettyEventLoopProxy.java:252) ~[?:?]
        at net.minecraft.server.v1_16_R3.NetworkManager.b(NetworkManager.java:311) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.NetworkManager.dispatchPacket(NetworkManager.java:267) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.NetworkManager.sendPacket(NetworkManager.java:243) ~[patched_1.16.5.jar:git-Paper-794]
        at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:1903) ~[patched_1.16.5.jar:git-Paper-794]
        ... 12 more

Plugin list

Plugins (68): AdvancedEnchantments, AuthMe, AutomaticBroadcast, AutoSellChests, BanManager, Chunky, Citizens, CoreProtect, DecentHolograms, DeluxeMenus, DiscordSRV, DotMan, DriveBackupV2, dynmap, Dynmap-Towny, EconomyShopGUI-Premium, Essentials, FastLogin, GCore, InteractiveChat, InteractiveChatDiscordSrvAddon, InvSeePlusPlus, LibsDisguises, LootCrate, LPX, LuckPerms, MineVNLib, MiniMOTD, MMOCore, MMOItems, Multiverse-Core, MyPet, MythicDungeons, MythicLib, MythicMobs, PL-Hide, PlaceholderAPI, PlayerAuctions, PlayerPoints, PlayerVaults, ProtocolLib, QuestCreator, RedeemableCodes, ResourceWorld, ROF_AntiVPN, RPGInventory, SiegeWar, SkinsRestorer, spark, suggestion, SuperVanish, TAB, TCPShield, Towny, TownyChat, TownyMenu, TradeSystem, Vault, ViaBackwards, ViaVersion, VoidGen, Votifier, VotingPlugin, Vulcan, WorldEdit, WorldGuard, WorldGuard-Towny, WorldGuardExtraFlags

Configuration file

https://hastebin.com/share/judonojaru.yaml

Server log

https://mclo.gs/CsNScaL

Plugin version

1.12-SNAPSHOT-4dd6b9a

Platform

Spigot

Relevance

• I tried the latest build
  (build refers to development builds not necessary a release version; i.e. v1.10 is out of date)

• I checked for existing tickets -
  If there are, please vote them with a thumbs reaction and not create new ones