Can't open the menu

Hi, Installed the plugin but when I try to open the menu nothing happens. My server gives the response "

[CustomGraffiti] Error (Object reference not set to an instance of an object)

at void Oxide.Plugins.CustomGraffiti.Console_Graffiti(Arg arg) in /home/rustserver/serverfiles/carbon/plugins/CustomGraffiti.cs:line 377

at object System.Reflection.RuntimeMethodInfo.Invoke(object obj, BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)"

I know I'm probably missing something but I can't see it.

Many thanks.

 

Unless it's because I'm running carbon not oxide as my modding framework.