Fatal error: Uncaught Zend_Cache_Exception: The apcu extension must be loaded for using this backend ! in /var/www/html/application/libraries/Zend/Cache.php:209
Stack trace:
#0 /var/www/html/application/libraries/Engine/Cache/Backend/Apc.php(28): Zend_Cache::throwException('The apcu extens...')
#1 /var/www/html/application/libraries/Zend/Cache.php(153): Engine_Cache_Backend_Apc->__construct(Array)
#2 /var/www/html/application/libraries/Zend/Cache.php(94): Zend_Cache::_makeBackend('Engine_Cache_Ba...', Array, true, false)
#3 /var/www/html/application/libraries/Engine/Cache.php(211): Zend_Cache::factory('core', 'Engine_Cache_Ba...', Array, Array, false, true, false)
#4 /var/www/html/application/modules/Core/Bootstrap.php(284): Engine_Cache::factory('core', 'Engine_Cache_Ba...', Array, Array, false, true)
#5 /var/www/html/application/libraries/Engine/Application/Bootstrap/Abstract.php(256): Core_Bootstrap->_initCache()
#6 /var/www/html/application/libraries/Engine/Application/Bootstrap/Abstract.php(207): Engine_Application_B in /var/www/html/application/libraries/Zend/Cache.php on line 209