Need to put Comment Form above Page Comments OR use a Slide In or ANYTHING

I need to put the Comment Forum at the Top of the Page Comments...  I found a thread answer providing that ability but the code is not working

https://wordpress.org/support/topic/shortcode-for-wpdiscuz/

Putting this shortcode above the page comments so users can easily leave a comment

[wpdiscuz_comments]

Putting this in function.php

function my_wpdiscuz_shortcode() {
  if (file_exists(ABSPATH . 'wp-content/plugins/wpdiscuz/templates/comment/comment-form.php')) {
      ob_start();
      include_once ABSPATH . 'wp-content/plugins/wpdiscuz/templates/comment/comment-form.php';
      return ob_get_clean();
  }
}
add_shortcode('wpdiscuz_comments', 'my_wpdiscuz_shortcode');