Fatal error: Uncaught ArgumentCountError: Too few arguments to function Zend_Controller_Response_Abstract::setHeader(), 1 passed in /homepages/6/d229456074/htdocs/website/frontend/application/controllers/ReferencesController.php on line 268 and at least 2 expected in /homepages/6/d229456074/htdocs/website/frontend/library/Zend/Controller/Response/Abstract.php:113 Stack trace: #0 /homepages/6/d229456074/htdocs/website/frontend/application/controllers/ReferencesController.php(268): Zend_Controller_Response_Abstract->setHeader('Content-Disposi...') #1 /homepages/6/d229456074/htdocs/website/frontend/library/Zend/Controller/Action.php(513): ReferencesController->refpdfAction() #2 /homepages/6/d229456074/htdocs/website/frontend/library/Zend/Controller/Dispatcher/Standard.php(295): Zend_Controller_Action->dispatch('refpdfAction') #3 /homepages/6/d229456074/htdocs/website/frontend/library/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Resp in /homepages/6/d229456074/htdocs/website/frontend/library/Zend/Controller/Response/Abstract.php on line 113