Почему не работает пагинация постов Wordpress?

Question

[Alex Kizyma]

$paged = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : '1';

$args = array(
    'post_type'         => 'test_post',
    'post_status'       => 'publish',
    'paged'             => $paged,
    'posts_per_page'    => 3,
    'meta_key'          => 'short_meta_key',
    'orderby'           => 'short_meta_key',
    'order'             => 'ASC'

);

$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post();
    global $post;
    $sub_header_meta = get_post_meta($post->ID, 'sub_header_meta_key', true);
    $short_number = get_post_meta($post->ID, 'short_meta_key', true) . " - індекс сортування";
    ?>

    <p class="short_number"><?=$short_number; ?></p>
    <h3><?php the_title()?></h3>
    <p class="sub_header"><?=$sub_header_meta;?></p>
    <span class="author-post"><?php the_author()?></span> <span class="date-post"><?php the_date()?></span>
    <p class="excerpt"><?php the_excerpt()?></p>
    <a href="<?php the_permalink()?>" class="more-link">Детально...</a>
    <hr>



<?php endwhile; ?>
<?php the_posts_pagination();?>