I have developed an application in Symfony 4. The application works perfectly in localhost, with the command php -S 127.0.0.1:8000 -t public I see the application in localhost: 8000, but if I access localhost / nameproject / public I have a page white. I ran the commands composer install --no - dev --optimize - autoloader, export APP_ENV = prod, php bin / console cache: clear --env = prod --no - debug and composer require symfony / apache - pack. Can someone help me?