Open Street Map: error display when 'marker_icon' is activated

Hello, it run well the 'marker_icon' ? I have errors when I display the map.
But if I comment the field / the line it run well the display map:

$args_osm = array(
    'width'        => '100%',
    'height'       => '400px',
    'zoom'         => 14,
    'marker'       => true,
    //'marker_icon'  => 'https://img.icons8.com/ios/50/000000/link-filled.png', // for example
    'marker_title' => 'Click meeee',
    'info_window'  => '<h3>HOLA</h3><p>Content</p>.',
    'js_options' => array(
        //'doubleClickZoom' => false,
    //'attribution' => 'asasdffsfasfdss',
     ),
);
// https://docs.metabox.io/fields/osm/
$osm_mapa = rwmb_meta( 'osm_mapa', $args_osm );

In the plugin:
plugins/meta-box/inc/fields/osm.php

I see that not exist the marker_icon.

$args = wp_parse_args(
     $args,
    array(
    'latitude'     => $latitude,
    'longitude'    => $longitude,
    'width'        => '100%',
    'height'       => '480px',
    'marker'       => true, // Display marker?
    'marker_title' => '', // Marker title, when hover.
    'info_window'  => '', // Content of info window (when click on marker). HTML allowed.
                'js_options'   => array(),
            )
        );

It's is ok this code?

Thanks,
Sergio