Revised single-unit.php template (for Genesis)

<?php

//* Replace Genesis loop
remove_action( 'genesis_loop', 'genesis_do_loop' );
add_action( 'genesis_loop', 'pactems_course_single_unit' );
function pactems_course_single_unit(){

        global $coursepress, $wp, $wp_query;

        $course_id = do_shortcode('[get_parent_course_id]');

        add_thickbox();

        $paged = ! empty( $wp->query_vars['paged'] ) ? absint($wp->query_vars['paged']) : 1;
        //redirect to the parent course page if not enrolled or not preview unit/page
        while ( have_posts() ) : the_post();
                $coursepress->check_access($course_id, get_the_ID());
        endwhile;

        $post = $unit->details; ?>


        <div id="primary" class="content-area">
                <main id="main" class="site-main" role="main">
                        <?php while ( have_posts() ) : the_post(); ?>
                                <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
                                        <header class="entry-header">
                                                <h3 class="entry-title"><?php echo do_shortcode('[course_title course_id="' . $course_id . '"]'); ?></h3>
                                                <?php
                                                echo do_shortcode('[course_unit_details unit_id="' . get_the_ID() . '" field="parent_course"]');
                                                ?>
                                        </header><!-- .entry-header -->
                                        <div class="instructors-content"></div>
                                        <?php
                                        echo do_shortcode('[course_unit_archive_submenu course_id="' . $course_id . '"]');
                                        ?>

                                        <div class="clearfix"></div>

                                        <?php echo do_shortcode('[course_unit_details unit_id="' . $course_id . '" field="unit_page_title" unit_title="'.get_the_title().'"]'); ?>

                                        <div class="entry-content">
                                                <?php
                                                if ( $paged == 1 ) { //Unit introduction will be shown only on the first page
                                                        the_content();
                                                }
                                                ?>
                                        </div>
                                        <?php Unit_Module::get_modules_front($unit->details->$course_id);?>
                                </article>
                        <?php endwhile; // end of the loop. ?>
                </main><!-- #main -->
        </div><!-- #primary -->

<?php }

genesis();