@klauz24
The topic name explain for himself, 
I got this error afther I used /vanish on, 
So  could you please fix this 
thank you very much 
Sincerely
TruxDeadnitro

Could you provide more information? And full error log please

[Error] Failed to call hook 'HWVanishCommand' on plugin 'HWVanish v1.1.0' (NullReferenceException: Object reference not set to an instance of an object)
  at GlobalItemManager.CreateItem (.ItemGeneratorAsset generator, Int32 stackSize) [0x00000] in <filename unknown>:0 
  at Oxide.Plugins.HWVanish.EnableVanish (.PlayerSession session) [0x00000] in <filename unknown>:0 
  at Oxide.Plugins.HWVanish.HWVanishCommand (.PlayerSession session, System.String command, System.String[] args) [0x00000] in <filename unknown>:0 
  at Oxide.Plugins.HWVanish.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00000] in <filename unknown>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00000] in <filename unknown>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00000] in <filename unknown>:0 

This is what I get when I'm trying to tun  the command /vanish on and on /vanish off

Thats weird, this shouldn't happen. I've tested and had another people has tested and it works for everyone

Merged post

Is your hurtworld server up to date?

14:00 [Error] Failed to call hook 'HWVanishCommand' on plugin 'HWVanish v1.1.0' (NullReferenceException: Object reference not set to an instance of an object)
  at GlobalItemManager.CreateItem (.ItemGeneratorAsset generator, Int32 stackSize) [0x00000] in <filename unknown>:0

  at Oxide.Plugins.HWVanish.EnableVanish (.PlayerSession session) [0x00000] in <filename unknown>:0

  at Oxide.Plugins.HWVanish.HWVanishCommand (.PlayerSession session, System.String command, System.String[] args) [0x00000] in <filename unknown>:0

  at Oxide.Plugins.HWVanish.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00000] in <filename unknown>:0

  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00000] in <filename unknown>:0

  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0

  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00000] in <filename unknown>:0

Yes it  is up to date.
Sorry the late repon i must tot it als Bush with my  Job