Unity Platform Effector 2D doesn't work for me

Hello, i'm trying to do a 2.5D plaftormer, for that i'm using only 2d colliders. I have a player controller script that i copied from a Unity tutorial:

 public class PhysicsObject : MonoBehaviour
 {
     [HideInInspector]
     public float minGroundNormalY = .65f;
 
     public float gravedad = 1f;
 
     protected Vector2 targetVelocity;
     protected bool grounded;
     protected Vector2 groundNormal;
     protected Rigidbody2D rb2d;
     protected Vector2 velocity;
     protected ContactFilter2D contactFilter;
     protected RaycastHit2D[] hitBuffer = new RaycastHit2D[16];
     protected List<RaycastHit2D> hitBufferList = new List<RaycastHit2D>(16);
 
 
     protected const float minMoveDistance = 0.001f;
     protected const float shellRadius = 0.01f;
 
     void OnEnable()
     {
         rb2d = GetComponent<Rigidbody2D>();
     }
 
     void Start()
     {
         contactFilter.useTriggers = false;
         contactFilter.SetLayerMask(Physics2D.GetLayerCollisionMask(gameObject.layer));
         contactFilter.useLayerMask = true;
     }
 
     void Update()
     {
         targetVelocity = Vector2.zero;
         ComputeVelocity();
     }
 
     protected virtual void ComputeVelocity()
     {
 
     }
 
     void FixedUpdate()
     {
         velocity += gravedad * Physics2D.gravity * Time.deltaTime;
         velocity.x = targetVelocity.x;
 
         grounded = false;
 
         Vector2 deltaPosition = velocity * Time.deltaTime;
 
         Vector2 moveAlongGround = new Vector2(groundNormal.y, -groundNormal.x);
 
         Vector2 move = moveAlongGround * deltaPosition.x;
 
         Movement(move, false);
 
         move = Vector2.up * deltaPosition.y;
 
         Movement(move, true);
     }
 
     void Movement(Vector2 move, bool yMovement)
     {
         float distance = move.magnitude;
 
         if (distance > minMoveDistance)
         {
             int count = rb2d.Cast(move, contactFilter, hitBuffer, distance + shellRadius);
             hitBufferList.Clear();
             for (int i = 0; i < count; i++)
             {
                 hitBufferList.Add(hitBuffer[i]);
             }
 
             for (int i = 0; i < hitBufferList.Count; i++)
             {
                 Vector2 currentNormal = hitBufferList[i].normal;
                 if (currentNormal.y > minGroundNormalY)
                 {
                     grounded = true;
                     if (yMovement)
                     {
                         groundNormal = currentNormal;
                         currentNormal.x = 0;
                     }
                 }
 
                 float projection = Vector2.Dot(velocity, currentNormal);
                 if (projection < 0)
                 {
                     velocity = velocity - projection * currentNormal;
                 }
 
                 float modifiedDistance = hitBufferList[i].distance - shellRadius;
                 distance = modifiedDistance < distance ? modifiedDistance : distance;
             }
 
 
         }
 
         rb2d.position = rb2d.position + move.normalized * distance;
     }
 
 }

The player script:

 public class PlayerPlatformerController : PhysicsObject
 {
     
     public int playerId;
     public float velocidadMax = 7;
     public float salto = 7;
 
     private SpriteRenderer spriteRenderer;
     private Animator animator;
 
     // Use this for initialization
     void Awake()
     {
         spriteRenderer = GetComponent<SpriteRenderer>();
         animator = GetComponent<Animator>();
     }
 
     protected override void ComputeVelocity()
     {
         Vector2 move = Vector2.zero;
 
         move.x = Input.GetAxis("Horizontal"+playerId);
 
         if (Input.GetButtonDown("Jump"+playerId) && grounded)
         {
             velocity.y = salto;
         }
         /*else if (Input.GetButtonUp("Jump"))
         {
             if (velocity.y > 0)
             {
                 velocity.y = velocity.y * 0.5f;
             }
         }*/
 
         /*bool flipSprite = (spriteRenderer.flipX ? (move.x > 0.01f) : (move.x < 0.01f));
         if (flipSprite)
         {
             spriteRenderer.flipX = !spriteRenderer.flipX;
         }*/
         if (move.x > 0.02f)
         {
             spriteRenderer.flipX = false;
         }
         if(move.x < -0.02f)
         {
             spriteRenderer.flipX = true;
         }
         animator.SetBool("grounded", grounded);
         animator.SetFloat("velocityX", Mathf.Abs(velocity.x) / velocidadMax);
         animator.SetFloat("velocityY", velocity.y);
 
         targetVelocity = move * velocidadMax;
     }
 }

So when i try to pass-trought the platform I can't, it detects it like a normal collision. What am i doing wrong?

(This is my first question, sorry if i am breaking some rule)