Failed to load resources on Limit Posts settings page

I think this may be the problem:

//Plugin name
if (!defined('CB_LIMIT_POSTS_PLUGIN_NAME')) {
    define('CB_LIMIT_POSTS_PLUGIN_NAME', trim(dirname(plugin_basename(__FILE__)), '/'));
}

// Plugin url
if (!defined('CB_LIMIT_POSTS_PLUGIN_URL')) {
    define('CB_LIMIT_POSTS_PLUGIN_URL', WP_PLUGIN_URL . '/' . CB_LIMIT_POSTS_PLUGIN_NAME);
}

.............

public function enqueueScripts(){
		wp_enqueue_script('cb_limit_posts_js', CB_LIMIT_POSTS_PLUGIN_URL . '/js/LimitPosts.js', array('jquery'));
		wp_enqueue_style('cb_limit_posts_css', CB_LIMIT_POSTS_PLUGIN_URL . '/css/limitposts.css');
}

most plugins don’t declare their file locations this way, and I believe it’s the cause for the 404 errors.

I fixed the issue by changing the following and removing all opening slashes on file location declares:

// Plugin url
if (!defined('CB_LIMIT_POSTS_PLUGIN_URL')) {
    define('CB_LIMIT_POSTS_PLUGIN_URL', plugin_dir_url( __FILE__ ));
}