Fatal error: Uncaught Error: Class "Silex\Application" not found in /home/ondemand/test.ondemandpro.net/php-docs-samples/appengine/flexible/staticcontent/app.php:23 Stack trace: #0 {main} thrown in /home/ondemand/test.ondemandpro.net/php-docs-samples/appengine/flexible/staticcontent/app.php on line 23