Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\HeaderBag" not found in /home1/aihika/public_html/elephant-society/vendor_old/symfony/http-foundation/ResponseHeaderBag.php:19 Stack trace: #0 {main} thrown in /home1/aihika/public_html/elephant-society/vendor_old/symfony/http-foundation/ResponseHeaderBag.php on line 19