problem with (Debugging in WordPress)

<?php do_action( 'generate_inside_comments' ); ?>

<?php
// If comments are closed and there are comments, let's leave a little note, shall we?
if ( ! comments_open() && '0' != get_comments_number() && post_type_supports( get_post_type(), 'comments' ) ) :
?>
<p class="no-comments"><?php _e( 'Comments are closed.', 'generatepress' ); ?></p>
<?php endif;

$commenter = wp_get_current_commenter();
$fields = array(
'author' => '<input placeholder="' . __( 'Name','generatepress' ) . ' *" id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) . '" size="30" />',
'email' => '<input placeholder="' . __( 'Email','generatepress' ) . ' *" id="email" name="email" type="text" value="' . esc_attr( $commenter['comment_author_email'] ) . '" size="30" />',
'url' => '<input placeholder="' . __( 'Website','generatepress' ) . '" id="url" name="url" type="text" value="' . esc_attr( $commenter['comment_author_url'] ) . '" size="30" />',
);
$defaults = array(
'fields' => apply_filters( 'comment_form_default_fields', $fields ),
'comment_field' => '<p class="comment-form-comment"><textarea id="comment" name="comment" cols="45" rows="8" aria-required="true"></textarea></p>',
'must_log_in' => '<p class="must-log-in">' . sprintf( __( 'You must be logged in to post a comment.','generatepress' ), wp_login_url( get_permalink() ) ) . '</p>',
'logged_in_as' => '<p class="logged-in-as">' . sprintf( __( 'Logged in as %2$s. Log out?','generatepress' ), admin_url( 'profile.php' ), $user_identity, wp_logout_url( get_permalink() ) ) . '</p>',
'comment_notes_before' => null,
'comment_notes_after' => null,
'id_form' => 'commentform',
'id_submit' => 'submit',
'title_reply' => apply_filters( 'generate_leave_comment', __( 'Leave a Comment','generatepress' ) ),
'title_reply_to' => apply_filters( 'generate_leave_reply', __( 'Leave a Reply to %s','generatepress' ) ),
'cancel_reply_link' => apply_filters( 'generate_cancel_reply', __( 'Cancel reply','generatepress' ) ),
'label_submit' => apply_filters( 'generate_post_comment', __( 'Post Comment','generatepress' ) ),
);
comment_form($defaults);
?>

<?php if ( have_comments() ) : ?>
<h3 class="comments-title">
<?php
$comments_number = get_comments_number();
if ( 1 === $comments_number ) {
printf(
/* translators: %s: post title */
esc_html_x( 'One thought on “%s”', 'comments title', 'generatepress' ),
'<span>' . get_the_title() . '</span>'
);
} else {
printf( // WPCS: XSS OK.
/* translators: 1: number of comments, 2: post title */
esc_html( _nx(
'%1$s thought on “%2$s”',
'%1$s thoughts on “%2$s”',
$comments_number,
'comments title',
'generatepress'
) ),
number_format_i18n( $comments_number ),
'<span>' . get_the_title() . '</span>'
);
}
?>
</h3>

<?php do_action( 'generate_below_comments_title' ); ?>

<?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : // are there comments to navigate through ?>
<nav id="comment-nav-above" class="comment-navigation" role="navigation">
<h1 class="screen-reader-text"><?php _e( 'Comment navigation', 'generatepress' ); ?></h1>

</nav><!-- #comment-nav-above -->
<?php endif; // check for comment navigation ?>

<?php
/* Loop through and list the comments. Tell wp_list_comments()
* to use generate_comment() to format the comments.
* If you want to override this in a child theme, then you can
* define generate_comment() and that will be used instead.
* See generate_comment() in inc/template-tags.php