My server works fine until it suddenly shuts down and I get this error

[12:34:19 INFO]: Plugins (66): PlaceholderAPI, PlugMan, NitroJoinMessage, SkinsRestorer, DeluxeTags, BPS-Free, CrazyMines, ForceTime, CoreProtect, CrazyDrugs, LazyStaffPlus, Essentials, killStats, ClearLag, AwesomeChatColor, BuycraftX, MessageAnnouncer, LazySecurity, ProtocolLib, HamsterAPI, InventoryRollback, MVdWPlaceholderAPI, FastAsyncWorldEdit, EssentialsChat, PermissionsEx, Vault, AdvancedClans, EZBlocks, Scoreboard-revision, Masks, EpicRename, MoneyPouch, HolographicDisplays, PlayerVaults, EssentialsSpawn, EZRanksPro, CustomPayloadFixer, ShopGUIPlus, WorldEdit, PlayerKits, ThotPatrol, SpigotGuard, DeluxeChat, Citizens, TradeSystem, DeluxeMenus, TAB, CrazyCrates, PlotSquared, WorldGuard, DeathMessages, CommandNPC, CrazyEnchantments, InvadedLandsEvents, KarenProtect, Multiverse-Core, Shopkeepers, CombatTagPlus, NoFlyZone, TokenEnchant, AuctionHouse, PrisonMines, AutoSell, InventoryFullPlus, LeaderHeads, Duels