i was following the roll a ball tutorial but it says there is a compile error in the script component and it says the referenced script on this behavior is missing

Having similar problems. Although my compiler errors are different (I've checked my code against the tutorial. My error messages are:

1. Expression denotes a type', where a variable', value' or method group' was expected

2. The best overloaded method match for UnityEngine.Rigidbody.AddForce(UnityEngine.Vector3)' has some invalid arguments 3. Argument #1' cannot convert object' expression to type UnityEngine.Vector3'

My code is: using UnityEngine; using System.Collections; public class PlayerController : MonoBehaviour { private Rigidbody rb; void Start () %|401944385_3|% rb = GetComponent<Rigidbody>(); } void FixedUpdate () %|2008330527_7|% %|1761885109_8|% float moveVertical = Input.GetAxis ("Vertical"); %|-547505816_10|% %|-131134806_11|% } }