Using shortcode to display a post category on a page

I am trying to add a couple of pages to a client’s website. He wanted his visitors to be able to click on a menu link and be taken to a page that displays all the posts from the category for that menu item… like menu item “Album Reviews” would take them to all of his music album reviews.

I did this successfully for 3 pages already. Now I’m trying to add 2 more, and I can’t get them to work.

The method I’m using (wish I could find the support page for it again) says to use the page.php page and create page-category-slug.php, with custom code added to display the category posts, like so:

<?php
/**
 * The template for displaying all pages.
 *
 * This is the template that displays all pages by default.
 * Please note that this is the WordPress construct of pages
 * and that other 'pages' on your WordPress site will use a
 * different template.
 *
 * @package fortunato
 */

get_header(); ?>

	<div id="primary" class="content-area">
		<main id="main" class="site-main" role="main">

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

				<?php get_template_part( 'content', 'page' ); ?>

<?php
echo do_shortcode('[catlist name=album-reviews excerpt=yes posts_morelink="Read more..."]');
?>

				<?php
					// 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;
				?>

			<?php endwhile; // end of the loop. ?>

		</main><!-- #main -->
	</div><!-- #primary -->

<?php get_sidebar(); ?>
<?php get_footer(); ?>

Is there something else I have to do beside creating the page? Do I need to edit something elsewhere to make the pages work? Any help would be much appreciated.