[1] Symfony\Component\Debug\Exception\FatalErrorException: Error: Call to a member function getTimestamp() on a non-object
    at n/a
        in /var/www/html/ezpublish52/vendor/ezsystems/ezpublish-kernel/eZ/Bundle/EzPublishIOBundle/BinaryStreamResponse.php line 105
 
    at eZ\Bundle\EzPublishIOBundle\BinaryStreamResponse->setAutoLastModified()
        in /var/www/html/ezpublish52/vendor/ezsystems/ezpublish-kernel/eZ/Bundle/EzPublishIOBundle/BinaryStreamResponse.php line 79
 
    at eZ\Bundle\EzPublishIOBundle\BinaryStreamResponse->setFile()
        in /var/www/html/ezpublish52/vendor/ezsystems/ezpublish-kernel/eZ/Bundle/EzPublishIOBundle/BinaryStreamResponse.php line 55
 
    at eZ\Bundle\EzPublishIOBundle\BinaryStreamResponse->__construct()
        in /var/www/html/ezpublish52/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/MVC/Symfony/Controller/Content/DownloadController.php line 66
 
    at eZ\Publish\Core\MVC\Symfony\Controller\Content\DownloadController->downloadBinaryFileAction()
        in /var/www/html/ezpublish52/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php line 147
 
    at call_user_func_array:{/var/www/html/ezpublish52/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php:147}()
        in /var/www/html/ezpublish52/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php line 147
 
    at Symfony\Component\HttpKernel\HttpKernel->handleRaw()
        in /var/www/html/ezpublish52/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php line 68
 
    at Symfony\Component\HttpKernel\HttpKernel->handle()
        in /var/www/html/ezpublish52/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php line 69
 
    at Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel->handle()
        in /var/www/html/ezpublish52/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php line 196
 
    at Symfony\Component\HttpKernel\Kernel->handle()
        in /var/www/html/ezpublish52/web/index.php line 81
 
    at {main}()
        in /var/www/html/ezpublish52/web/index.php line 0