我定制了一个帖子类型“Dream”。代码如下：

//Add custom post type by Akash
add_action( \'init\', \'create_post_type\');
function create_post_type() {   
    register_post_type( 
        \'dream\',
        array(
            \'labels\' => array(
                \'name\' => __( \'Dreams\' ),
                \'singular_name\' => __( \'Dream\' ) 
            ),        
            \'taxonomies\' => array(\'category\', \'post_tag\'),
            \'capability_type\' => \'post\',     
            \'map_meta_cap\' => true,
            \'hierarchical\' => false,
            \'rewrite\' => array(\'slug\' => \'Dreams\'),
            \'query_var\' => false,    
            \'delete_with_user\' => true,
            \'supports\' => array( 
                \'title\', \'editor\', \'author\', \'thumbnail\', 
                \'excerpt\', \'trackbacks\', \'custom-fields\', 
                \'comments\', \'revisions\', \'post-formats\' 
            ),
            \'public\' => true,
            \'has_archive\' => true
        )
    );
}

当我尝试以管理员身份添加CPT“Dream”时，它会显示用于添加媒体的特色图像块，但当我尝试以作者身份执行相同操作时，不会显示特色图像块。如何解决此问题？