Featured Image Not Showing Up

Hi

I paste this code to functions.php :

if( class_exists( ‘kdMultipleFeaturedImages’ ) ) {

$args = array(
‘id’ => ‘featured-image-2’,
‘post_type’ => ‘page’, // Set this to page
‘labels’ => array(
‘name’ => ‘Featured image 2’,
‘set’ => ‘Set featured image 2’,
‘remove’ => ‘Remove featured image 2’,
‘use’ => ‘Use as featured image 2’,
)
);

new kdMultipleFeaturedImages( $args );
}

and this code to page.php :

if( class_exists( ‘kdMultipleFeaturedImages’ ) ) {
kd_mfi_the_featured_image( ‘featured-image-2’, ‘page’, ‘full’ );
}

Thanks.

I have also installed Dynamic Featured Image plugin. I notice this plugin is quite easier than the other plugin. However, I notice that once the second image is selected by clicking “insert into post” button. The whole box becomes blank. I have tried to deactivate some of the plugin. It is still the same. Do you have any solution ?

Thanks.