An exception occured while bootstrapping the application.

The apc extension must be loaded for using this backend !
Stack Trace:
#0 /var/www/vhosts/benchmarkingapp.prwd.co.uk/library/Zend/Cache/Backend/Apc.php(58): Zend_Cache::throwException('The apc extensi...')
#1 /var/www/vhosts/benchmarkingapp.prwd.co.uk/library/Zend/Cache.php(152): Zend_Cache_Backend_Apc->__construct(Array)
#2 /var/www/vhosts/benchmarkingapp.prwd.co.uk/library/Zend/Cache.php(93): Zend_Cache::_makeBackend('APC', Array, false, false)
#3 /var/www/vhosts/benchmarkingapp.prwd.co.uk/app/bootstrap.php(85): Zend_Cache::factory('Core', 'APC', Array, Array)
#4 /var/www/vhosts/benchmarkingapp.prwd.co.uk/public/index.php(39): require('/var/www/vhosts...')
#5 {main}