Fatal error:  Uncaught RuntimeException: Failed to start the session. in /var/www/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:193
Stack trace:
#0 /var/www/vendor/symfony/http-foundation/Session/Session.php(57): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start()
#1 /var/www/vendor/shopware/shopware/engine/Library/Enlight/Components/Session/Namespace.php(172): Symfony\Component\HttpFoundation\Session\Session->start()
#2 /var/www/vendor/shopware/shopware/engine/Shopware/Components/DependencyInjection/Bridge/Session.php(140): Enlight_Components_Session_Namespace->start()
#3 /var/www/var/cache/production_95e77156a9/proxies/ShopwareProductionaa4c63917f36ea95e83d68da2a9ff6d178f62ae9ProjectContainer.php(8050): Shopware\Components\DependencyInjection\Bridge\Session->createSession(Object(ShopwareProductionaa4c63917f36ea95e83d68da2a9ff6d178f62ae9ProjectContainer), NULL)
#4 /var/www/vendor/symfony/dependency-injection/Container.php(257): ShopwareProductionaa4c63917f36ea95e83d68da2a9ff6d178f62ae9ProjectContainer->getSessionService()
#5 /var/www/vendor/symfony/dependency-injection/Container.php(231): Symfony\Component\DependencyInjection\Container->make('session', 1)
#6 /var/www/vendor/shopware/shopware/engine/Shopware/Components/DependencyInjection/Container.php(209): Symfony\Component\DependencyInjection\Container->get('session', 1)
#7 /var/www/vendor/shopware/shopware/engine/Shopware/Components/DependencyInjection/Container.php(133): Shopware\Components\DependencyInjection\Container->doLoad('session', 'session', 1)
#8 /var/www/vendor/shopware/shopware/engine/Shopware/Components/ShopRegistrationService.php(85): Shopware\Components\DependencyInjection\Container->get('session')
#9 /var/www/vendor/shopware/shopware/engine/Shopware/Components/ShopRegistrationService.php(55): Shopware\Components\ShopRegistrationService->registerResources(Object(Shopware\Models\Shop\DetachedShop))
#10 /var/www/vendor/shopware/shopware/engine/Shopware/Plugins/Default/Core/Router/Bootstrap.php(99): Shopware\Components\ShopRegistrationService->registerShop(Object(Shopware\Models\Shop\DetachedShop))
#11 /var/www/vendor/shopware/shopware/engine/Library/Enlight/Event/Handler/Plugin.php(155): Shopware_Plugins_Core_Router_Bootstrap->onRouteStartup(Object(Enlight_Controller_EventArgs))
#12 /var/www/vendor/shopware/shopware/engine/Library/Enlight/Event/EventManager.php(207): Enlight_Event_Handler_Plugin->execute(Object(Enlight_Controller_EventArgs))
#13 /var/www/vendor/shopware/shopware/engine/Library/Enlight/Controller/Front.php(159): Enlight_Event_EventManager->notify('Enlight_Control...', Object(Enlight_Controller_EventArgs))
#14 /var/www/vendor/shopware/shopware/engine/Shopware/Kernel.php(195): Enlight_Controller_Front->dispatch()
#15 /var/www/shopware.php(20): Shopware\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request))
#16 {main}
  thrown in /var/www/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php on line 193