Fatal error: Uncaught Error: Class "Concrete\Core\Entity\Notification\Notification" not found in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/src/Entity/Notification/UserSignupNotification.php:15 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/src/Entity/Notification/UserSignupNotification.php on line 15