My server had pvp enabled perfectly fine for a long period of time, however the next day it seemed to have stopped working. I have tried all possible ways to resolve the issue this includes Multiverse-Core,Essentials and Bukkit.yml. It still not working the plugins i have are BossBarAutoMessage, Questioner, BarAPI, Groupmanager, Plugman, Banmanager, Hidestream,Modtrs,Framprotect, world edit, HeathBar, Essentials, GameModeInventories, SugbRank, AutoMessage, ChatControl, Votifier, Kits, Protocollib, Multi-Verse Core, Lib'sDisguises, NoCheatPlus, OITC, ImageonMap, Realstockmarket, EssentialsChat, Sticknamer, Lottery, PlayerCountMessage, Vault, EnjinMinecraftPlugin, Chatgames, Bkcommonlib, Lift, LWC, Worldguard, JCVaultListener, Essentialsprotect, EssentialsAntibuild, SimpleAlias, EssentialsSpawn, Prism, Expbottles, Towny, Whatisit, BuyRegion, ChestShop, FloAuction, SurvivalGames and ChairStairs,