Animator is not playing a Playable

I have written the beginnings of a manager, where one could create and spawn a prefab for any item and could access its properties(attack, value, etc.) that could be used to determine the values of another group of properties. The only problem is that when the script is using the Animator of the item, it will not play. The warning, "Animator is not a Playable" appears at line number 35 of the PlayerCombat script when setting the trigger, "Attack". Do note that the Animator has another animation state called, "Idle", which automatically starts, and works as it should. Although, the "Attack" animation state doesn't work once the trigger, "Attack", is set. Please let me know how to fix this, so that the animation can be played.

The item stats script:

 using UnityEngine;
 using System.Collections;
 
 public class Item : MonoBehaviour
 {
     [SerializeField]
     private GameObject item;
     [SerializeField]
     private ItemName itemName;
     [SerializeField]
     private Animator weaponAnimator;
     [SerializeField]
     private int attackPoints;
     [SerializeField]
     private float attackRange;
     [SerializeField]
     private float attackDelay;
 
     public GameObject ItemObject { get { return item; } }
     public ItemName Name { get { return itemName; } }
     public Animator WeaponAnimator { get { return weaponAnimator; } }
     public int AttackPoints { get { return attackPoints; } }
     public float AttackRange { get { return attackRange; } }
     public float AttackDelay { get { return attackDelay; } }
 }

The player attack script:

 using UnityEngine;
 using System.Collections;
 
 public class PlayerCombat : MonoBehaviour
 {
     [SerializeField]
     private Item item;
     private bool canAttack;
 
     public Camera Cam
     {
         get
         {
             return GetComponentInParent<Camera>();
         }
     }
 
     void Start ()
     {
         if (item == null)
         {
             Equip();
         }
 
         canAttack = true;
     }
 
     void Update ()
     {
         if (Input.GetButtonDown("Fire1"))
         {
             if (canAttack)
             {
                 canAttack = false;
                 item.WeaponAnimator.SetTrigger("Attack");
                 RaycastHit hit;
                 Ray ray = Camera.main.ScreenPointToRay(new Vector3(Cam.pixelWidth / 2, Cam.pixelHeight / 2, 0));
                 if (Physics.Raycast(ray, out hit))
                 {
                     if (hit.distance <= item.AttackRange)
                     {
                         var health = hit.collider.gameObject.GetComponent<HealthLogic>();
                         if (health != null)
                         {
                             health.HealthPoints -= item.AttackPoints;
                         }
                     }
                 }
 
                 StartCoroutine(AttackPause());
             }
         }
     }
 
     public void Equip()
     {
         item = ItemDatabase.Search(ItemName.Hammer);
         Instantiate(item, gameObject.transform);
     }
 
     private IEnumerator AttackPause()
     {
         yield return new WaitForSeconds(item.AttackDelay);
         canAttack = true;
     }
 }