An unhandled error occured

Security exception - invalid and potentially unsafe Request URI detected

Stack trace
#0 /mnt/web318/c0/96/56995296/htdocs/website/base/SMController.class.php(79): SMController->securityValidation()
#1 /mnt/web318/c0/96/56995296/htdocs/website/index.php(26): SMController->__construct()
#2 {main}