Fatal error: Uncaught Error: Call to undefined function app() in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/views/dialogs/file/versions.php:14 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/views/dialogs/file/versions.php on line 14