Try this,
public static function loadScripts(&$params)
{
$doc = JFactory::getDocument(); //On line 24 remove the &
$doc->addScript(JURI::Root(true).'/modules/mod_vertical_scroll_recent_article/mod_vertical_scroll_recent_article.js');
}
This module is written for Joomla lower versions that why this kind of errors.
Hope its works..