Hi I get an error code when i'm using my Javascript and I can't understand how to fix it... :(

This script is just a simple javascript that makes an animation start at the beginning and also disables the "Character Motor" so the character doesn't move at the beginning and also the camera values are Reset so I can't look Around but when the animation is over the "Character Motor" is enabled and the camera values are back as they where from the beginning. Everything works but I just get this annoying error... Please Help :)

This is the error code:

NullReferenceException: Object reference not set to an instance of an object StartCAS.Update () (at Assets/Jonathan/Script/StartCAS.js:21)