Fatal error: Uncaught UnexpectedValueException: The Response content must be a string or object implementing __toString(), "boolean" given. in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Response.php:406 Stack trace: #0 /var/www/html/src/AppBundle/Controller/DefaultController.php(251): Symfony\Component\HttpFoundation\Response->setContent(false) #1 /var/www/html/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php(151): AppBundle\Controller\DefaultController->infoDownloadAction('602620327c94410...') #2 /var/www/html/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #3 /var/www/html/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php(169): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #4 /var/www/html/web/app.php(19): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfo in /var/www/html/app/Resources/TwigBundle/views/Exception/error.html.twig on line 1