It’s not clear if you’re trying to load these files on frontend or backend. For the backend I usually do this: define(‘MY_PLUGIN_DIR_URL’, plugin_dir_url(__FILE__)); //LOAD ADMIN/BACKEND CSS STYLES add_action(‘admin_enqueue_scripts’, ‘my_plugin_enqueue_style_and_scripts’, 99); function my_plugin_enqueue_style_and_scripts() { $timestamp = time(); wp_enqueue_style(‘my-plugin-backend’, MY_PLUGIN_DIR_URL.’/css/style.css’, false, $timestamp, ‘all’); wp_enqueue_script( ‘my-plugin-backend’, MY_PLUGIN_DIR_URL.’/js/script.js’, array( ‘signature’ ), $timestamp, true ); } You doesn’t need to … Read more