@petrayvonneenglish,

Is there the following code in the active theme functions.php file?

function my_wpdiscuz_shortcode() {
    $html = "";
    if (file_exists(ABSPATH . "wp-content/plugins/wpdiscuz/themes/default/comment-form.php")) {
        ob_start();
        include_once ABSPATH . "wp-content/plugins/wpdiscuz/themes/default/comment-form.php";
        $html = ob_get_clean();
    }
    return $html;
}
add_shortcode("wpdiscuz_comments", "my_wpdiscuz_shortcode");

I had it inside my functions.php file but when I looked I saw that it was gone ... yesterday I made an update of my generate press theme, is it possible that with this update it will be deleted? I have reintroduced it and it works fine again. Thanks a lot! If there is anything else I will write to you again. Greetings.