我在一个叫做Categories.

<?php
/*
Template Name: Categories
*/

get_header(); ?>

    <section id="primary" class="content-area">

        <main id="main" class="site-main" role="main">

        <header class="page-header">
                <h1 class="page-title">
                    Categories
                </h1>
        </header><!-- .page-header -->

        <?php   

        $paged = (get_query_var(\'paged\')) ? get_query_var(\'paged\') : 1;

        $args = array(
            \'post_type\' => \'post\',
            \'posts_per_page\' => \'4\',
            \'paged\' => get_query_var(\'paged\')
        );
        $the_query = new WP_Query( $args ); ?>

        <?php if ( $the_query->have_posts() ) : ?>

            <?php while ( $the_query->have_posts() ) : $the_query->the_post(); ?>

                <?php
                    get_template_part( \'content\', \'categories\' );
                ?>

            <?php endwhile; ?>

            <?php wp_pagenavi( array( \'query\' => $the_query ) ); ?>
            <?php wp_reset_query(); ?>

        <?php endif; ?>

        </main><!-- #main -->
    </section><!-- #primary -->

<?php get_sidebar(); ?>
<?php get_footer(); ?>

但是，当我单击下一页时（链接类似于example.com/categories/page/2/ ) 我得到404页。

为什么会这样？如何修复它？