Fatal error: Uncaught ReflectionException: Class "Magento\Framework\Serialize\Serializer\Serialize" does not exist in /home/lacoste/web-test/vendor/magento/framework/Code/Reader/ClassReader.php:34 Stack trace: #0 /home/lacoste/web-test/vendor/magento/framework/Code/Reader/ClassReader.php(34): ReflectionClass->__construct() #1 /home/lacoste/web-test/vendor/magento/framework/ObjectManager/Definition/Runtime.php(54): Magento\Framework\Code\Reader\ClassReader->getConstructor() #2 /home/lacoste/web-test/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(48): Magento\Framework\ObjectManager\Definition\Runtime->getParameters() #3 /home/lacoste/web-test/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() #4 /home/lacoste/web-test/vendor/magento/framework/App/ObjectManager/ConfigLoader.php(94): Magento\Framework\ObjectManager\ObjectManager->get() #5 /home/lacoste/web-test/vendor/magento/framework/App/ObjectManager/ConfigLoader.php(79): Magento\Framework\App\ObjectManager\ConfigLoader->getSerializer() #6 /home/lacoste/web-test/vendor/magento/framework/App/ObjectManager/Environment/Developer.php(79): Magento\Framework\App\ObjectManager\ConfigLoader->load() #7 /home/lacoste/web-test/vendor/magento/framework/App/ObjectManagerFactory.php(191): Magento\Framework\App\ObjectManager\Environment\Developer->configureObjectManager() #8 /home/lacoste/web-test/vendor/magento/framework/App/Bootstrap.php(212): Magento\Framework\App\ObjectManagerFactory->create() #9 /home/lacoste/web-test/vendor/magento/framework/App/Bootstrap.php(127): Magento\Framework\App\Bootstrap->__construct() #10 /home/lacoste/web-test/pub/index.php(27): Magento\Framework\App\Bootstrap::create() #11 {main} thrown in /home/lacoste/web-test/vendor/magento/framework/Code/Reader/ClassReader.php on line 34