If there is no script installed in the root for your domain name but you still get this message it means that a previously installed script was not properly removed. In order to solve this issue you should follow these steps:

1. Log in cPanel and click on File Manager;

2. Navigate to .fantasticodata in your Home Directory;

3. Delete the file installed_in_root.php.

This will ensure there is no Fantastico information remaining from previous installations.