Invalid Layer

Questions & Answers
1

I have a script (the first one below) that if I press X the player animates and the sword as well if its equipped. The player animates correctly when i press X but the sword animation dont show at all.

The problem as i understand it that cant find it since its on -1 and cant play the animation but i never had a -1 layer and never had anything there as far as i understand. Below is the problem Unity points to with the Invalid Layer -1 problem. I have to clue on what to do to to fix it some please help me. And talk to me like im a noob-ish

public void PlayAnimation(AnimationClip clip)
{

        //anim.SetInteger("State", 1);
        anim.Play(clip.name);
    }

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Player : MonoBehaviour
{

    private Weapon weaponEquipped;
    private Attack attack;
    private Animator anim;
    public float fireRate;
    private float nextAttack;

    void Start()
        {
        anim = GetComponent<Animator>();
        attack = GetComponentInChildren<Attack>();
        }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.X) && Time.time > nextAttack && weaponEquipped !=null)
        {
            anim.SetTrigger("Blade_Attack");
            attack.PlayAnimation(weaponEquipped.animation);
            nextAttack = Time.time + fireRate;
        }
    }

    public void AddWeapon(Weapon weapon)
        {
        weaponEquipped = weapon;
        GetComponentInChildren<Attack>().SetWeapon(weaponEquipped.damage);
        }


}
2

And here is the attack script attached to the game object with the animation

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Attack : MonoBehaviour {

	private Animator anim;
	private int damage;

	// Use this for initialization
	void Start () {
		anim = GetComponent<Animator>();
	}
	
	public void PlayAnimation(AnimationClip clip)
	{
		
        //anim.SetInteger("State", 1);
        anim.Play(clip.name);
    }

	public void SetWeapon(int damageValue)
	{
		damage = damageValue;
	}

	public int GetDamage()
	{
		return damage;
	}

    /*private void OnTriggerEnter2D(Collider2D other)
	{
		Enemy enemy = other.GetComponent<Enemy>();
		if(enemy != null)
		{
			enemy.TakeDamage(damage);//despues de damage + FindObjectOfType<Player>().strength si vas a usar la fuerza
        }
	}*/

  
}