We have clicked your provided website link, but it’s not working. Please check the screenshot as reference http://prntscr.com/e2yxxy
However, we guess the issue you have faced that is your hosting server issue. This is because, we have double checked the new PHPMailer that we have provided with our template and there we don’t get any problem.
In this issue, you could contact with your hosting provider or you could change your contact menu link to WHMCS contact page link.
Please Note: PHPMailer is a 3rd party script. If your hosting server is not supporting this anyway, then there is nothing to do.