css tidak mau load di wordpress

entah kenapa beberapa hari saya coba sama saja, terkadang cssnya mau load terkadang tidak?? di wordpress offline belom di hosting function.php

<?php

//load script css ataupun javascript
function css(){
  wp_enqueue_style('style.css', get_stylesheet_uri() );
}

add_action('wp_enqueue_scripts', 'css');

//------the_excerpt
function get_excerpt_lenght(){
  return 5;
}

function return_excerpt_text(){
  return '';
}

add_filter('excerpt_more', 'return_excerpt_text');
add_filter('experpt_lenght', 'get_the_excerpt');

function init_setup(){
  register_nav_menus(array(
    'main_menu' => 'Menu Utama',
    'footer_menu' => 'Menu footer'
  ));

//add featured image
  add_theme_support('post-thumbnails');
  add_image_size('small_thumb', 150, 150, true);
  add_image_size('big_thumb', 450, 450, true);

  add_theme_support( 'post-formats', array( 'aside', 'gallery' ) );
}

add_action('after_setup_theme', 'init_setup');

function widget_setup(){
  register_sidebar(array(
    'name' => "Sidebar pertama",
    'id' => "sidebar"
  ));

  register_sidebar(array(
    'name' => "Sidebar kedua",
    'id' => "sidebar2"
  ));

}

add_action('widgets_init', 'widget_setup');
 ?>

index.php

<?php get_header(); ?>

<main>
<?php
  if( have_posts() ):
  while(have_posts()): the_post();
    get_template_part('content', get_post_format());
    endwhile;
  else:
    echo "tidak ada post";
  endif;
?>
</main>

<aside>
  <?php dynamic_sidebar('sidebar') ?>
</aside>

<?php get_footer(); ?>