character istn climbing stairs

[MiguelDevelopper]

my character dont climb the stairs even with a step of 1 meter

extends StairsCharacter

@export var state : Label

#player vars
@export var SPEED = 1.67
@export var JUMP_VELOCITY = 4.5
@export var RUN_MULTIPLIER = 2.994
@export var SENSIVILITY = 0.01
var canMove = true

# camera vars
var tps_mode = false
var lastTps = "rigth"
@onready var fps_pos = $"fps"
@onready var tps_pos1 = $"tps"
@onready var tps_pos2 = $"tps2"
@onready var camera = $Camera3D

#inventory vars
@onready var inventoryUi = $inventory
@export var inventory : Inventory

func _ready() -> void:
	Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)

func _process(delta: float) -> void:
	if canMove:
		if Input.is_action_just_pressed("Change_View"):
			if tps_mode:
				var tween = get_tree().create_tween().set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_OUT)
				tween.tween_property(camera, "position", fps_pos.transform.origin, 0.4)
				tps_mode = false
			else:
				var tween = get_tree().create_tween().set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_OUT)
				if lastTps == "rigth":
					tween.tween_property(camera, "position", tps_pos1.transform.origin, 0.4)
				else:
					tween.tween_property(camera, "position", tps_pos2.transform.origin, 0.4)
				tps_mode = true
			
		const POSITION_TOLERANCE = 0.01
	
		if tps_mode:
			if Input.is_action_just_pressed("view_side_left"):
				if camera.global_transform.origin.distance_to(tps_pos2.global_transform.origin) > POSITION_TOLERANCE:
					var tween = get_tree().create_tween().set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_OUT)
					tween.tween_property(camera, "position", tps_pos2.transform.origin, 0.4)
					lastTps = "left"
			elif Input.is_action_just_pressed("view_side_Rigth"):
				if camera.global_transform.origin.distance_to(tps_pos1.global_transform.origin) > POSITION_TOLERANCE:
					var tween = get_tree().create_tween().set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_OUT)
					tween.tween_property(camera, "position", tps_pos1.transform.origin, 0.4)
					lastTps = "rigth"
	if Input.is_action_just_pressed("inventory"):
		if inventoryUi.visible != true:
			inventoryUi.visible = true
			Input.set_mouse_mode(Input.MOUSE_MODE_CONFINED)
			canMove = false
		else:
			inventoryUi.visible = false
			Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
			canMove = true

func _unhandled_input(event: InputEvent) -> void:
	if event is InputEventMouseMotion:
		$".".rotate_y(-event.relative.x * SENSIVILITY)
		camera.rotate_x(-event.relative.y * SENSIVILITY)
		camera.rotation.x = clamp(camera.rotation.x, deg_to_rad(-60),deg_to_rad(60))

func _physics_process(delta: float) -> void:
	
	# Add the gravity.
	if not is_on_floor():
		velocity += get_gravity() * delta
	
	if canMove:

		# Handle jump.
		if Input.is_action_just_pressed("ui_accept") and is_on_floor():
			velocity.y = JUMP_VELOCITY

		# Get the input direction and handle the movement/deceleration.
		# As good practice, you should replace UI actions with custom gameplay actions.
		var input_dir := Input.get_vector("Move_Left", "Move_Rigth", "Move_Foward", "Move_Backward")
		var direction := (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
		if direction:
			if Input.is_action_pressed("Run"):
				if state:
					state.text = "RUNING"
				velocity.x = direction.x * (SPEED * RUN_MULTIPLIER)
				velocity.z = direction.z * (SPEED * RUN_MULTIPLIER)
			else:
				if state:
					state.text = "WALKING"
				velocity.x = direction.x * SPEED
				velocity.z = direction.z * SPEED
		
		else:
			velocity.x = move_toward(velocity.x, 0, SPEED)
			velocity.z = move_toward(velocity.z, 0, SPEED)
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
		velocity.z = move_toward(velocity.z, 0, SPEED)
	desired_velocity = velocity.normalized()
	move_and_stair_step()

im doing something wrong?