How to call the_author_meta and make it work?

Add your author meta information after if ( have_posts() ) :

    <?php if ( have_posts() ) : the_post(); ?>

    About <?php the_author(); ?>, the author of this blog
    <?php userphoto_the_author_thumbnail() ?>
    <?php echo get_the_author_meta( 'description' ); ?>

<?php rewind_posts();

while ( have_posts() ) : the_post(); ?>

<?php //loop stuff  ?>

<?php endwhile; else: ?>
<p><?php _e('Sorry, no posts matched your criteria.'); ?></p>
<?php endif; ?>