did you delete it???

WorldEdit, NoSwear, Buycraft, SimpleAutoAnnouncer, Vault, PermissionsEx, LWC, WorldGuard, TF2, SimpleRestart, ProtectionStones, ColoredMotd, Advertise_Blocker, InvisibleWalls, Essentials, EssentialsProtect, UberEnchant, EssentialsSpawn, PlotMe, EssentialsAntiBuild, EssentialsChat, Multiverse-Core, Paintball, HungerGames, MobArena, AncientGates, Multiverse-Inventories

Can you please give us some more information?

We need to know what plugins you have installed.