Hi @rickblackdog
I believe that is because you were trying to get the location outside the loop. Could you please move it into the loop like this:
<?php
$args = array( 'post_type' => 'members', 'posts_per_page' => -1 );
$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post(); ?>
<?php $location = get_field('location'); ?>
<div class="marker" data-lat="<?php echo $location['lat']; ?>" data-lng="<?php echo $location['lng']; ?>"></div>
<?php endwhile; ?>
I hope this helps 🙂
