One Page WordPress Site Workshop not working, even the theme on the project file. Kindly assist.

<?php
/**
 * Template Name: One Page Site
 */

get_header(); ?>

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

            <?php 
                $args = array(
                    'post_type' => 'page',
                    'order' => 'ASC'
                );
                $the_query = new WP_Query( $args );         
            ?>
            <?php if ( have_posts() ) : while ( $the_query->have_posts() ) : $the_query->the_post(); ?> 

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

            <?php endwhile; endif; ?>

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

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