Message: Return value of System\Controller\Download::run() must be an instance of Symfony\Component\HttpFoundation\Response, null returned
File   : /var/www/shop/lib/System/Controller/Download.php
Line   : 161
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#0 /var/www/shop/lib/System/Controller/Front.php(81): System\Controller\Download->run()
#1 /var/www/shop/htdocs/index.php(19): System\Controller\Front->run()
#2 {main}