CoursePress single unit on a Genesis theme

<?php

add_action( 'genesis_meta', 'pactems_course_permission_queries' );
function pactems_course_permission_queries() {
    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;
}


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

    <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();