VAM LarrysArms.HairColorChanger error

[anoncatz]

!> Exception caught: System.NullReferenceException: Object reference not set to an instance of an object
  at LarrysArms.HairColorChanger.Init () [0x00000] in <filename unknown>:0

I see many vam scenes have this error that it become quite a common issue,

does anyone know what this error about,

why is this plugin LarrysArms.HairColorChanger.2.var always causing this error in various scenes?

and how to solve it once for good?