Fatal error: Uncaught Error: Class 'Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag' not found in /home/admin2bannerworl/public_html/admin2.bannerworld.co.uk/vendor-old/symfony/http-foundation/Session/Attribute/NamespacedAttributeBag.php:20 Stack trace: #0 {main} thrown in /home/admin2bannerworl/public_html/admin2.bannerworld.co.uk/vendor-old/symfony/http-foundation/Session/Attribute/NamespacedAttributeBag.php on line 20