我正在寻找一种方法来显示页面导航的两个按钮“上一个”和“下一个”，但使用下面的代码，我只能显示一个。我不理解代码中的错误（如下所示）：

<div class="cover--nav">
        <?php
            $currenttPostId = get_the_ID();
            $theCategory = get_the_terms(get_the_ID(),\'recipe_category\');

                global $wp_query;


                $args = array(
                    \'post_type\' => \'recipe\',
                    \'orderby\' => \'rand\',
                    \'post_status\' => \'publish\',
                    \'recipe_category\'=> !empty($theCategory)? $theCategory[0]->slug : \'\',
                    \'post__not_in\' => array($currenttPostId), 
                    \'posts_per_page\' => 2,
                    \'paged\' => $paged  //very important
                );
                $wp_query = new WP_Query($args);


                $prevNext = array();

                if ( $wp_query->have_posts() ) :
                    while ( $wp_query->have_posts() ) : $wp_query->the_post();
                        the_title();
                    endwhile;
                endif;


                wp_reset_postdata();


                $prev_label = "<span class=\'cover--nav-label\'>" . _e(\'Recette précédente\', \'marque\') . "</span>";

                $prev_arrow = "<svg class=\'icon icon-arrow-prev\' role=\'presentation\' focusable=\'false\'><use xlink:href=\'" . get_template_directory_uri() . "/images/symbol-defs.svg#icon-arrow-prev\'></use></svg>";

                $prev_text = $prev_label . $prev_arrow;



                $next_label = "<span class=\'cover--nav-label\'>" . _e(\'Recette suivante\', \'marque\') . "</span>";

                $next_arrow = "<svg class=\'icon icon-arrow-next\' role=\'presentation\' focusable=\'false\'><use xlink:href=\'" . get_template_directory_uri() . "/images/symbol-defs.svg#icon-arrow-next\'></use></svg>";

                $next_text = $next_label . $next_arrow;

                the_posts_navigation( array(
                \'prev_text\' => $prev_text,
                \'next_text\' => $next_text,
                ) );



                ?>

        </div>