ACF Post Object not working

I am using ACF (Advanced Custom Fields) in my wordpress site. Currently, I am trying to get some 'related products' working in a page.

In my ACF, I have the following:

And for my code I have the following:

    if( have_rows('related_product') ):

     // loop through the rows of data
    while ( have_rows('related_product') ) : the_row();

        if( get_row_layout() == 'product_name' ): ?>

        <ul style="list-style-type:none; padding-left:0;">
            <li><a href="<?php the_sub_field('product_link'); ?>"><?php the_sub_field('product_1'); ?></a></li>
      </ul>



        <?php elseif( get_row_layout() == 'download' ): 

            $file = get_sub_field('file');

        endif;

    endwhile;

else :

    // no layouts found

endif;

?>

If I change the post_object field to just text, this works perfectly. But I would rather have it so the user could select the product using Post_object.

Any help?

Cheers.