NullReferenceException at OnPlayerConnectedError

I have been getting this error in console but I have been ignoring it.

Failed to call hook 'OnPlayerConnected' on plugin 'Vanish v1.6.6' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.Vanish.OnPlayerConnected (BasePlayer player) [0x00000] in <158c019628264074833757e68bd32cb3>:0
  at Oxide.Plugins.Vanish.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x003b5] in <158c019628264074833757e68bd32cb3>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <e23ba2c0f246426296d81c842cbda3af>:0                                                                                                                    155b/s in, 1kb/s out
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <50629aa0e75d4126b345d8d9d64da28d>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <50629aa0e75d4126b345d8d9d64da28d>:0​

Can you dm me your config and data file