Hey, so I've been having this issue now. My spawning eggs don't work, for players or for OP's. You can hear a sound, but they then disappear. This is on all worlds. Anyone know what plugin conflicts with it? Vault, VoteLink, Wither, uSkyBlock, AutoMessage, SurvivalGames, SuperLogger, ProtocolLib, LoginSecurity, Votifier, mcMMO, Jobs, HideStream, SimpleBackup, KeepXP, LinksOnSigns, WorldEdit, PermissionsBukkit, ColouredMotd, TNT, PlayerHeads, CombatTag, MyCommand, Paintball, CookieMonster, WorldGuard, iConomy, CoreProtect, MonsterFix, ItemGamble, ClearLag, Suit, GroupTele, AutoSaveWorld, Simple Prefix, Essentials, Orebfuscator, ServerSigns, Enjin Minecraft Plugin, PlotMe, DisguiseCraft, EssentialsChat, WGCustomFlags, EssentialsSpawn, VanishNoPacket, Factions, MobDisguisePVPControl, Multiverse-Core, Multiverse-Inventories, SimpleChestLock, GriefPrevention, Multiverse-Portals, ChestShop, BattleArena, ArenaSpleef, AntiCheat
just disable some plugins until you're allowed. Then narrow it down to which one. Isn't that hard to accomplish.