https://pastebin.com/vug3iZGb
What were you expecting to happen? What happened instead?
let the warning go.
What Spigot version are you using? Type /version
PacketListenerAPI 3.7.8-SNAPSHOT
What plugins are you using? Type /plugins
Plugins (68): InventoryRollbackPlus, PlaceholderAPI, MMOLib, EpicBlockCommands, SkinsRestorer, TabCompleteFilter, NBTAPI, LuckPerms, PacketListenerApi, ConditionalEvents, PlayerControlPlus, BuycraftX, ProtocolLib, PixelMOTD, RoyaleEconomy, CS-CoreLib, Vault, JadGens, AdvancedLogin, SimpleRename, BetterProfiles, BotSentry, HolographicDisplays, EpicCraftingsPlus, StaffPlus, Companions, PlayerKits, DarkAuctions, Essentials, AdvancedBan, HeadDatabase, Multiverse-Core, TrMenu, FastAsyncWorldEdit (WorldEdit), DragonSlayer, TAB, VoidTeleport, WorldGuard, EssentialsProtect, CubCustomDrops, EssentialsSpawn, ACubelets, AdvancedEnchantments, ExecutableItems, MMOItems, EnderContainers, Shopkeepers, WolfyUtilities, ArmorStandTools, CustomPiglinsTrades, CustomCrafting, Lands, BetterRTP, WanderingTrades, Slimefun, SlimefunOreChunks, ElectricSpawners, SlimyTreeTaps, PrivateStorage, DyedBackpacks, EcoPower, MobCapturer, ChestTerminal, ExoticGarden, LiteXpansion, SoulJars, CoreProtect, ChatControl
Do you have an error log? Use pastebin.com. If you're not sure, upload your whole server log
Did your client crash? Upload errors in .minecraft/logs/latest.log as well
Additional information? (Are you using Bungeecord? Did it work in previous versions? etc.)