Can you help solve the following error?

I'm making a 2d pacman game and I have been following a tutorial as I am new to c#. I am trying to animate the pacman by making it move however I keep getting the same error and therefore my game will not work.

The error I have been receiving is: Animator is not playing a Playable UnityEngine.Animator:SetFloat(String, Single) PacmanMove:FixedUpdate() (at Assets/Scripts/PacmanMove.cs:36)

and the code I have used is: using UnityEngine; using System.Collections;

public class PacmanMove : MonoBehaviour { public float speed = 0.4f; Vector2 dest = Vector2.zero;

 void Start()
 {
     dest = transform.position;
 }

 void FixedUpdate()
 {
     // Move closer to Destination
     Vector2 p = Vector2.MoveTowards(transform.position, dest, speed);
     GetComponent<Rigidbody2D>().MovePosition(p);

     // Check for Input if not moving
     if ((Vector2)transform.position == dest)
     {
         if (Input.GetKey(KeyCode.UpArrow) && valid(Vector2.up))
             dest = (Vector2)transform.position + Vector2.up;
         if (Input.GetKey(KeyCode.RightArrow) && valid(Vector2.right))
             dest = (Vector2)transform.position + Vector2.right;
         if (Input.GetKey(KeyCode.DownArrow) && valid(-Vector2.up))
             dest = (Vector2)transform.position - Vector2.up;
         if (Input.GetKey(KeyCode.LeftArrow) && valid(-Vector2.right))
             dest = (Vector2)transform.position - Vector2.right;
     }

     // Animation Parameters
     Vector2 dir = dest - (Vector2)transform.position;
     GetComponent<Animator>().SetFloat("DirX", dir.x);
     GetComponent<Animator>().SetFloat("DirY", dir.y);
 }

 bool valid(Vector2 dir)
 {
     // Cast Line from 'next to Pac-Man' to 'Pac-Man'
     Vector2 pos = transform.position;
     RaycastHit2D hit = Physics2D.Linecast(pos + dir, pos);
     return (hit.collider == GetComponent<Collider2D>());
 }

}

PLEASE HELP.