Sticky Posts Not Working

last time i tried to change the functions.php file with the following code

add_filter('the_posts', 'bump_sticky_posts_to_top');
function bump_sticky_posts_to_top($posts) {
    foreach($posts as $i => $post) {
        if(is_sticky($post->ID)) 
        {
            $stickies[] = $post;
            unset($posts[$i]);
        }
    }
    
    if(!empty($stickies)) 
        return array_merge($stickies, $posts);
    
    return $posts;
}

it just broke and started to give me the following error upon access:

Warning: require_once(config-wpml/config.php): failed to open stream: No such file or directory in /home4/aum/public_html/wp-includes/functions.php on line 29

Fatal error: require_once(): Failed opening required 'config-wpml/config.php' (include_path='.:/opt/php55/lib/php') in /home4/aum/public_html/wp-includes/functions.php on line 29

any suggestions how to make it work? the website url is: http://www.oshonow.net