[Plugin: Advanced Custom Fields] Google map doesn't load

I am trying to use google map custom field for my posts, I set up marker and publish an article but the map doesn’t show up however div is create because I can see the whitespace

in my functions.php file:

if(function_exists("register_field_group"))
{
	register_field_group(array (
		'id' => 'acf_mapa',
		'title' => 'Mapa',
		'fields' => array (
			array (
				'key' => 'field_55c8a94c36b47',
				'label' => '',
				'name' => 'mapa',
				'type' => 'google_map',
				'center_lat' => '48.6724821',
				'center_lng' => '19.696058',
				'zoom' => '7',
				'height' => '250',
			),
		),
		'location' => array (
			array (
				array (
					'param' => 'post_type',
					'operator' => '==',
					'value' => 'post',
					'order_no' => 0,
					'group_no' => 0,
				),
			),
		),
		'options' => array (
			'position' => '',
			'layout' => 'wp_box',
			'hide_on_screen' => array (
			),
		),
		'menu_order' => 0,
	));

}

	function theme_add_scripts() {
		wp_enqueue_script( 'google-map', 'https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false', array(), '3', true );
		wp_enqueue_script( 'google-map-init', get_template_directory_uri() . '/google-map.js', array('google-map', 'jquery'), '0.1', true );
	}

	add_action( 'wp_enqueue_scripts', 'theme_add_scripts' );if(function_exists("register_field_group"))
{
	register_field_group(array (
		'id' => 'acf_mapa',
		'title' => 'Mapa',
		'fields' => array (
			array (
				'key' => 'field_55c8a94c36b47',
				'label' => '',
				'name' => 'mapa',
				'type' => 'google_map',
				'center_lat' => '48.6724821',
				'center_lng' => '19.696058',
				'zoom' => '7',
				'height' => '250',
			),
		),
		'location' => array (
			array (
				array (
					'param' => 'post_type',
					'operator' => '==',
					'value' => 'post',
					'order_no' => 0,
					'group_no' => 0,
				),
			),
		),
		'options' => array (
			'position' => '',
			'layout' => 'wp_box',
			'hide_on_screen' => array (
			),
		),
		'menu_order' => 0,
	));

}

	function theme_add_scripts() {
		wp_enqueue_script( 'google-map', 'https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false', array(), '3', true );
		wp_enqueue_script( 'google-map-init', get_template_directory_uri() . '/google-map.js', array('google-map', 'jquery'), '0.1', true );
	}

	add_action( 'wp_enqueue_scripts', 'theme_add_scripts' );

in my js file:

(function($) {

/*
*  render_map
*
*  This function will render a Google Map onto the selected jQuery element
*
*  @type	function
*  @date	8/11/2013
*  @since	4.3.0
*
*  @param	$el (jQuery element)
*  @return	n/a
*/

function render_map( $el ) {

	// var
	var $markers = $el.find('.marker');

	// vars
	var args = {
		zoom		: 16,
		center		: new google.maps.LatLng(0, 0),
		mapTypeId	: google.maps.MapTypeId.ROADMAP
	};

	// create map
	var map = new google.maps.Map( $el[0], args);

	// add a markers reference
	map.markers = [];

	// add markers
	$markers.each(function(){

    	add_marker( $(this), map );

	});

	// center map
	center_map( map );

}

/*
*  add_marker
*
*  This function will add a marker to the selected Google Map
*
*  @type	function
*  @date	8/11/2013
*  @since	4.3.0
*
*  @param	$marker (jQuery element)
*  @param	map (Google Map object)
*  @return	n/a
*/

function add_marker( $marker, map ) {

	// var
	var latlng = new google.maps.LatLng( $marker.attr('data-lat'), $marker.attr('data-lng') );

	// create marker
	var marker = new google.maps.Marker({
		position	: latlng,
		map			: map
	});

	// add to array
	map.markers.push( marker );

	// if marker contains HTML, add it to an infoWindow
	if( $marker.html() )
	{
		// create info window
		var infowindow = new google.maps.InfoWindow({
			content		: $marker.html()
		});

		// show info window when marker is clicked
		google.maps.event.addListener(marker, 'click', function() {

			infowindow.open( map, marker );

		});
	}

}

/*
*  center_map
*
*  This function will center the map, showing all markers attached to this map
*
*  @type	function
*  @date	8/11/2013
*  @since	4.3.0
*
*  @param	map (Google Map object)
*  @return	n/a
*/

function center_map( map ) {

	// vars
	var bounds = new google.maps.LatLngBounds();

	// loop through all markers and create bounds
	$.each( map.markers, function( i, marker ){

		var latlng = new google.maps.LatLng( marker.position.lat(), marker.position.lng() );

		bounds.extend( latlng );

	});

	// only 1 marker?
	if( map.markers.length == 1 )
	{
		// set center of map
	    map.setCenter( bounds.getCenter() );
	    map.setZoom( 16 );
	}
	else
	{
		// fit to bounds
		map.fitBounds( bounds );
	}

}

/*
*  document ready
*
*  This function will render each map when the document is ready (page has loaded)
*
*  @type	function
*  @date	8/11/2013
*  @since	5.0.0
*
*  @param	n/a
*  @return	n/a
*/

$(document).ready(function(){

	$('.acf-map').each(function(){

		render_map( $(this) );

	});

});

})(jQuery);

in the loop:

<?php 

	$location = get_field('mapa');

	if( ! empty($location) ):

	?>

	<div class="acf-map">

	<div class="marker" data-lat="<?php echo $location['lat']; ?>" data-lng="<?php echo $location['lng']; ?>"></div>

	</div>

	<?php endif; ?>