我想你对google validator有问题itemprop="logo". 你可以在get_custom_header 过滤并更改HTML结构：

add_filter( \'get_custom_logo\', \'my_custom_logo\' );
// Filter the output of logo to fix Googles Error about itemprop logo
function my_custom_logo() {
    $custom_logo_id = get_theme_mod( \'custom_logo\' );
    $html = sprintf( \'<a href="%1$s" class="custom-logo-link" rel="home" itemprop="url">%2$s</a>\',
            esc_url( home_url( \'/\' ) ),
            wp_get_attachment_image( $custom_logo_id, \'full\', false, array(
                \'class\'    => \'custom-logo\',
            ) )
        );
    return $html;   
}

编辑根据@birgire的评论，我编写了另一个函数来过滤wp_get_attachment_image():

add_filter(\'wp_get_attachment_image\', function ($attachment_id, $size , $icon , $attr) {
        // If the class is \'custom-logo\', then change the itemprop to image
        if ($attr[\'class\'] ==\'custom-logo\') {
            $attr[\'itemprop\'] = \'image\';
        }
        return $attr;
},10,3);