Help with this error: Operator '*' cannot be used with a left hand side of type 'Object' and a right hand side of type 'UnityEngine.Vector3'.

Getting this error on the scripting for my camera that follows my plane around. Error is "Operator '*' cannot be used with a left hand side of type 'Object' and a right hand side of type 'UnityEngine.Vector3'." This has been working fine for months but today it's decided not to work.

Any help?

Script:

 var target : Transform;
 // The distance in the x-z plane to the target
 var distance = 10.0;
 // the height we want the camera to be above the target
 var height = 5.0;
 // How much we 
 var heightDamping = 2.0;
 var rotationDamping = 3.0;
 var currentHeight;
 var wantedHeight;
 var currentRotationAngle;
 var wantedRotationAngle;
 var currentRotation; 
 
 
 // Place the script in the Camera-Control group in the component menu
 @script AddComponentMenu("Camera-Control/Smooth Follow");
 
 
 function LateUpdate () {
     // Early out if we don't have a target
     if (!target)
         return;
     
     // Calculate the current rotation angles
     wantedRotationAngle = target.eulerAngles.y;
     wantedHeight = target.position.y + height;
         
     currentRotationAngle = transform.eulerAngles.y;
     currentHeight = transform.position.y;
     
     // Damp the rotation around the y-axis
     currentRotationAngle = Mathf.LerpAngle (currentRotationAngle, wantedRotationAngle, rotationDamping * Time.deltaTime);
 
     // Damp the height
     currentHeight = Mathf.Lerp (currentHeight, wantedHeight, heightDamping * Time.deltaTime);
 
     // Convert the angle into a rotation
     currentRotation = Quaternion.Euler (0, currentRotationAngle, 0);
     
     // Set the position of the camera on the x-z plane to:
     // distance meters behind the target
     transform.position = target.position;
     transform.position -= currentRotation * Vector3.forward * distance;
 
     // Set the height of the camera
     transform.position.y = currentHeight;
     
     // Always look at the target
     transform.LookAt (target);
 }