我已将您的CPT代码复制到本地主机。我不得不补充register_post_type( \'facebook\', $args ); 让CPT发挥作用。不知道您是否忘记将这段代码添加到问题中的代码中。我还补充道\'has_archive\' => true, 正如我之前所建议的那样。然后，我更新了我的永久链接，该链接设置为“Post name”。

我还创建了两个模板，archive-facebook.php 和single-facebook.php. 这正如预期的那样。

我在子主题和父主题中对此进行了测试。

其他注意事项，\'add_new_item\' => __("Add new Facebook post"), 本地化是错误的。翻译人员does not 识别内部字符串". 您应该始终使用单引号\' 喜欢\'add_new_item\' => __(\'Add new Facebook post\'),

这是您修改过的代码，经过测试，它运行得非常完美

$labels = array(
    \'name\' => _x(\'Facebook\', \'post type general name\'),
    \'singular_name\' => _x(\'Facebook\', \'post type singular name\'),
    \'all_items\' => __( \'All posts\' ),
    \'add_new\' => _x(\'Add new post\', \'Facebook\'),
    \'add_new_item\' => __(\'Add new Facebook post\'),
    \'edit_item\' => __(\'Edit Facebook post\'),
    \'new_item\' => __(\'New Facebook post\'),
    \'view_item\' => __(\'View Facebook posts\'),
    \'search_items\' => __(\'Search in Facebook posts\'),
    \'not_found\' =>  __(\'No facebook posts found\'),
    \'not_found_in_trash\' => __(\'No facebook posts found in trash\'),
    \'parent_item_colon\' => \'\'
  );
//$post_supports = array(\'title\',\'editor\',\'comments\',\'thumbnail\',\'excerpt\');
$post_supports = array(\'title\',\'editor\',\'thumbnail\');
$args = array(
    \'labels\' => $labels,
    \'public\' => true,
    \'publicly_queryable\' => true,
    \'show_ui\' => true,
    \'query_var\' => true,
    //\'menu_icon\' => get_stylesheet_directory_uri() . \'/images/slider.png\',
    \'rewrite\' => true,
    \'capability_type\' => \'post\',
    \'hierarchical\' => false,
    \'menu_position\' => null,
    \'supports\' => $post_supports,
    \'has_archive\' => true
  );

register_post_type( \'facebook\', $args );