PHP Fatal Error

Got this error when trying Verivication

PHP Fatal error: Call to a member function add() on a non-object in /home/a85940246/public_html/wp-pwtw2014/plugins/register-plus-redux/rpr-login.php on line 557

Apache version 2.2.25
PHP version 5.3.27
MySQL version 5.5.36-cll

Anyone have the same problem?

Thanks

https://www.ads-software.com/plugins/register-plus-redux/