WHMCS Integration Issue

Please visit

https://www.pilotchatterhosting.com/hosting-control-panel/?whmcsportal%5Bpage%5D=whmcs%3A%2F%2Forders.pilotchatterhosting.com%2Fcart.php

As you can see, the integration doesn't work as it is not presented properly on this page. I used the content shortcode. Please advise.