Fatal error: Uncaught Error: Class 'Everrich\Web\Controller\RedirectResponse' not found in /var/www/html/src/Web/Controller/CouponController.php:23 Stack trace: #0 /var/www/html/vendor/symfony/http-kernel/HttpKernel.php(149): Everrich\Web\Controller\CouponController->showCheckCoupon() #1 /var/www/html/vendor/symfony/http-kernel/HttpKernel.php(66): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #2 /var/www/html/public/index.php(59): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #3 {main} thrown in /var/www/html/src/Web/Controller/CouponController.php on line 23