Display Wishlist Items from Shortcode

Hello, I am currently trying to display a user’s wishlist courses via a shortcode. I have code below that I have been modifying, however, I believe the error in pulling the wishlist courses back is coming from the ‘tutor-utils()->get_wishlist($user_id)’ line below. Would you have any recommendations as to how to approach this? Or if the wishlist info for a user is stored off-site from Worpress, how would I query to that? Thank you!

/**
* Enrolled Course Shortcode
*/

function tutor_enrolled_course_register_shortcodes() {
    add_shortcode( 'enrolled-course', 'shortcode_tutor_enrolled_course' );
}
add_action( 'init', 'tutor_enrolled_course_register_shortcodes' );

/**
 * Shortcode Callback
 */

function shortcode_tutor_enrolled_course( $atts ) {
    ?>

<h3><?php _e('Enrolled Courses', 'tutor'); ?></h3>

<div class="ians-course-wrapper">

	<?php
    $user_id = get_current_user_id();
	$my_courses = tutor_utils()->get_wishlist($user_id);
	
	if ($my_courses && $my_courses->have_posts()):
		while ($my_courses->have_posts()):
			$my_courses->the_post();
            $post = $my_courses->post;
			?>
            

                    <a href="<?php the_permalink();?>"><?php the_post_thumbnail('thumbnail'); ?><?php the_title(); ?></a>
       
                
			<?php
		endwhile;

		wp_reset_postdata();
    else:
        echo "<div class='tutor-mycourse-wrap'><div class='tutor-mycourse-content'>".__('You haven\'t enrolled in any courses.', 'tutor')."</div></div>";
	endif;

	?>

</div>
<?php }