The error I received immediately after installing is

Fatal error: Class 'JParameter' not found in /home/content/63/6281263/html/administrator/components/com_jfusion/models/model.factory.php on line 29


I tried uninstalling, but the error remains. This has crashed my site, with the exception of the administrator panel... What can I do to fix it?

Please provide us a link to your site.