Map not displaying in the front end

Hi, I've been trying to get a Google map to display in the front end, it looks fine in the custom meta but when I try to output I get nothing, no errors, nothing.

this is how I set up the field in the custom meta file:

		// Venue Postcode
		array(
			'name'  => esc_html__( 'Venue Postcode' ),
			'id'    => "leisure_venue_postcode",
			'desc'  => esc_html__( 'Venue Postcode' ),
			'type'  => 'text',
			//'readonly' => true,
		),		
		array(
			'id'            => 'leisure_venue_location',
			'name'          => __( 'Venue Location' ),
			'type'          => 'map',
			// Default location: 'latitude,longitude[,zoom]' (zoom is optional)
			'std'           => '50.2270734,-5.2778787,17',
			// Name of text field where address is entered. Can be list of text fields, separated by commas (for ex. city, state)
			'address_field' => 'leisure_venue_postcode',
		),	

Then I output the map in a template file using the following code:

$args = array(
    'type'         => 'map',
    'width'        => '100%', // Map width, default is 640px. Can be '%' or 'px'
    'height'       => '480px', // Map height, default is 480px. Can be '%' or 'px'
    'zoom'         => 14,  // Map zoom, default is the value set in admin, and if it's omitted - 14
    'marker'       => true, // Display marker? Default is 'true',
    'marker_title' => '', // Marker title when hover
    'info_window'  => '<h3>Info Window Title</h3>Info window content. HTML <strong>allowed</strong>', // Info window content, can be anything. HTML allowed.
);
print rwmb_meta( 'leisure_venue_location', $args ); // For current post

I used this page as a reference: https://github.com/rilwis/meta-box/blob/master/demo/map.php
and this: https://metabox.io/docs/display-map-in-the-front-end/

all the other meta in the page is displaying fine with no issues.