所以我得到以下错误Warning: printf(): Too few arguments in /lib/helpers.php on line 34

所以第34行是\'class\' => []

// Define the read more url
function read_more_url() {

    // Grab the posts link and title
    echo \'<a href="\' . esc_url(get_the_permalink()) . \'" title="\' . the_title_attribute([\'echo\' => false]) . \'">\';

    printf(
        // Filters text content and strips out disallowed HTML
        wp_kses(
            __(\'Read more <span class="u-screen-reader-text">about %s</span>\', \'Sema\'),
            [
                \'span\' => [
                    \'class\' => []
                ]
            ]
        )
    );
}