I did replace ‘field_name’ but now everything disappeared, nothing at all is showing.
<main id="main" class="site-main" role="main">
<?php
while ( have_posts() ) : the_post();
get_template_part( 'template-parts/content', 'page' );
// If comments are open or we have at least one comment, load up the comment template.
if ( comments_open() || get_comments_number() ) :
comments_template();
endif;
endwhile; // End of the loop.
?>
<?php while( have_rows('person') ): the_row();
$image_url = get_sub_field('headshot');
$name = get_sub_field('name');
$credentials = get_sub_field('credentials');
$link = get_sub_field('link');
$expertise = get_field_object('expertise');
$value = $field['value'];
$choices = $field['choices'];
if( $value ):
?>
<div class="person">
<div class="col-sm-4 col-xs-12 text-center">
<div class="headshot-container">
<img src="<?php echo $image_url; ?>" alt="<?php echo $name; ?>" />
</div>
<div class="name">
<?php echo $name; ?>
</div>
<div class="credentials">
<?php echo $credentials; ?>
</div>
<div class="expertise">
Expertise:
<?php foreach( $value as $v ): ?>
<div><?php echo $choices[ $v ]; ?></div>
<?php endforeach; ?>
</div>
<a href="<?php echo $link; ?>" class="link">View Profile</a>
</div>
</div>
<?php endif; ?>
<?php endwhile; ?>
</main><!-- #main -->
