Fatal error: Class 'Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag' not found in /var/www/html/dev/spa/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php on line 21

Call Stack:
    0.0004     257656   1. {main}() /var/www/html/dev/spa/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php:0