The path is not allowed: media/attachment/file/1/8/1893_1893-1_manual_1.pdf
#0 /var/www/html/vendor/magento/framework/App/Bootstrap.php(264): Magento\MediaStorage\App\Media->launch()
#1 /var/www/html/pub/get.php(87): Magento\Framework\App\Bootstrap->run(Object(Magento\MediaStorage\App\Media))
#2 {main}