Fatal error: require_once(): Failed opening required 'app/Mage.php' (include_path='/home/uberae/public_html/app/code/local:/home/uberae/public_html/app/code/community:/home/uberae/public_html/app/code/core:/home/uberae/public_html/lib:.:/opt/cpanel/ea-php56/root/usr/share/pear') in /home/uberae/public_html/app/code/community/Facebook/AdsToolbox/Block/ViewCategory.php on line 11