Why is the Quicktags plugin not working?

Question

WordPress

Hello.
There is a comment form:

<?php if(function_exists('wp_comment_quicktags_plus')) wp_comment_quicktags_plus(); ?>


<textarea id="comment" name="comment" cols="45"  rows="8" placeholder="Введите текст комментария..." maxlength="65525" style="min-height: 200px;"></textarea></p>

<p class="form-submit"><input name="submit" type="submit" id="submit" class="submit" value="Отправить комментарий"> <input type="hidden" name="comment_post_ID" value="<?php the_ID(); ?>" id="comment_post_ID">
<input type="hidden" name="comment_parent" id="comment_parent" value="0">
</p>

<input type="hidden" id="_wp_unfiltered_html_comment_disabled" name="_wp_unfiltered_html_comment" value="4b1c815afc">

Quicktags are displayed but nothing happens when clicked.
Plugin Russian QuickTags Plus