Fatal error with PHP 5.3.3

Replies: 0

Using the latest version of wordpress (4.7.3) with PHP 5.3.3 causes a fatal error:

Fatal error: Can't inherit abstract function Aventura\Wprss\Core\Model\Event\EventInterface::getData() (previously declared abstract in Aventura\Wprss\Core\DataObjectInterface) in /var/www/html/wp-content/plugins/wp-rss-aggregator/includes/Aventura/Wprss/Core/Model/Event/EventAbstract.php on line 11

I am using the latest version of the plugin 4.11.1.

Note this error does not occur with PHP 5.6.30

Please can you fix this as I am currently unable to upgrade on the production server. Many thanks.