Wordpress single.php显示文章标题，但不显示内容

嗨，我想知道是否有人能尽快帮我。

我在一个客户网站上工作，突然间，博客文章只显示标题，而没有显示内容。

我不知道为什么，需要一些帮助。

这是单个.php 的代码

    <div id="primary" class="content-area">
    <?php get_template_part( 'content', 'single' ); ?>

        <div id="content" class="site-content" role="main">
    <?php while ( have_posts() ) : the_post(); ?>

            <?php nightwatch_content_nav( 'nav-below' ); ?>
            <?php
                // If comments are open or we have at least one comment, load up the comment template
                if ( comments_open() || '0' != get_comments_number() )
                    comments_template( '', true );
            ?>
        <?php endwhile; // end of the loop. ?>
        </div><!-- #content .site-content -->
    </div><!-- #primary .content-area -->

谢谢你的帮助。

*编辑

以下是content-single.php代码

<?php
/**
* @package nightwatch
* @since nightwatch 1.0.2
*/
?>
<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
<header class="entry-header">
    <h1 class="entry-title"><?php the_title(); ?></h1>
    <div class="entry-meta">
        <?php nightwatch_posted_on(); ?>
    </div><!-- .entry-meta -->
</header><!-- .entry-header -->
<div class="entry-content">
    <?php the_content(); ?>
    <?php wp_link_pages( array( 'before' => '<div class="page-links">' . __(               '    Pages:', 'nightwatch' ), 'after' => '</div>' ) ); ?>
</div><!-- .entry-content -->
<footer class="entry-meta">
    <?php
        /* translators: used between list items, there is a space after the           comma */
        $category_list = get_the_category_list( __( ', ', 'nightwatch' ) );
        /* translators: used between list items, there is a space after the comma */
        $tag_list = get_the_tag_list( '', ', ' );
        if ( ! nightwatch_categorized_blog() ) {
            // This blog only has 1 category so we just need to worry    about tags in the meta text
            if ( '' != $tag_list ) {
                $meta_text = __( 'This entry was tagged %2$s.     Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.',    'nightwatch' );
            } else {
                $meta_text = __( 'Bookmark the <a href="%3$s"   title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'nightwatch' );
            }
        } else {
            // But this blog has loads of categories so we should    probably display them here
            if ( '' != $tag_list ) {
                $meta_text = __( 'This entry was posted in %1$s and    tagged %2$s. Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'nightwatch' );
            } else {
                $meta_text = __( 'This entry was posted in %1$s. 
Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.',   'nightwatch' );
            }
        } // end check for categories on this blog
        printf(
            $meta_text,
            $category_list,
            $tag_list,
            get_permalink(),
            the_title_attribute( 'echo=0' )
        );
    ?>
    <?php edit_post_link( __( 'Edit', 'nightwatch' ), '<span class="edit-    link">', '</span>' ); ?>
</footer><!-- .entry-meta -->
</article><!-- #post-<?php the_ID(); ?> -->'