Same here, Not sure why. The plugin seems to be trying to send players a msg/warning.
(23:22:55) | Failed to call hook 'OnEntityTakeDamage' on plugin 'RealPVE v0.1.16' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.RealPVE.SendMessageText (Oxide.Core.Libraries.Covalence.IPlayer player, System.String text, System.Boolean isWarning) [0x0000c] in <784de797119e4236a5b709a843efba80>:0
at Oxide.Plugins.RealPVE+VehicleData.CanPerformAction (BasePlayer player, System.Boolean checkFriends, System.Boolean sendMsg) [0x000bc] in <784de797119e4236a5b709a843efba80>:0
at Oxide.Plugins.RealPVE+VehicleData.CanLoot (BasePlayer player) [0x00000] in <784de797119e4236a5b709a843efba80>:0
at Oxide.Plugins.RealPVE.HandleDamageToVehicle (BaseCombatEntity vehicle, HitInfo info) [0x00076] in <784de797119e4236a5b709a843efba80>:0
at Oxide.Plugins.RealPVE.OnEntityTakeDamage (BatteringRam batteringRam, HitInfo info) [0x00000] in <784de797119e4236a5b709a843efba80>:0
at Oxide.Plugins.RealPVE.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00734] in <784de797119e4236a5b709a843efba80>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <8cb2d664f1574f2b96d53f1c1869d96a>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <8cb2d664f1574f2b96d53f1c1869d96a>:0
