Fatal error:  Uncaught Error: Class "Facebook\Facebook" not found in /srv/www/allesvoorscooters/public/app/code/local/ConceptCreative/Facebook/Helper/Data.php:47
Stack trace:
#0 /srv/www/allesvoorscooters/public/app/code/local/ConceptCreative/Facebook/Helper/Data.php(63): ConceptCreative_Facebook_Helper_Data->getSDK()
#1 /srv/www/allesvoorscooters/public/app/code/local/ConceptCreative/Facebook/controllers/IndexController.php(13): ConceptCreative_Facebook_Helper_Data->getLoginUrl()
#2 /srv/www/allesvoorscooters/public/app/code/core/Mage/Core/Controller/Varien/Action.php(418): ConceptCreative_Facebook_IndexController->loginfacebookAction()
#3 /srv/www/allesvoorscooters/public/app/code/local/Mage/Core/Controller/Varien/Router/Standard.php(299): Mage_Core_Controller_Varien_Action->dispatch()
#4 /srv/www/allesvoorscooters/public/app/code/core/Mage/Core/Controller/Varien/Front.php(182): Mage_Core_Controller_Varien_Router_Standard->match()
#5 /srv/www/allesvoorscooters/public/app/code/core/Mage/Core/Model/App.php(357): Mage_Core_Controller_Varien_Front->dispatch()
#6 /srv/www/allesvoorscooters/public/app/Mage.php(750): Mage_Core_Model_App->run()
#7 /srv/www/allesvoorscooters/public/index.php(71): Mage::run()
#8 {main}
  thrown in /srv/www/allesvoorscooters/public/app/code/local/ConceptCreative/Facebook/Helper/Data.php on line 47