I want to make navigation for melee mob in another scene but map_get_path doesn't working

:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By Nizil
extends KinematicBody2D

var velocity = Vector2.ZERO
var mob_speed = 200
var path
var global_target
var next_dote
var agent_rid

onready var agent = $NavigationAgent2D
onready var player = get_tree().current_scene.get_node("Player")


func _ready():
	agent_rid = agent.get_navigation_map()
	set_path_to_the_player()

func _physics_process(delta):
	velocity = move_and_slide(velocity)
	check_velocity()
	
func set_path_to_the_player():
	global_target = player.global_position
	path = Navigation2DServer.map_get_path(agent_rid, global_position, global_target, true) #Everyone node is exists in another scene.
	print(path) #it returns []
	path.remove(0)
	
	agent.set_target_location(path[0]) #error row
	
	next_dote = agent.get_next_location()
	velocity = global_position.direction_to(next_dote) * mob_speed
	
	agent.set_velocity(velocity)

func check_velocity():
	if global_position.distance_to(next_dote) < 1:
		path.remove(0)

I tried to make normal navigation to melee, but path is empty everytime. I wrote the comments to rows where error appears. I need help, please.