whmcs-multisite-provisioning setup - wp login

Re: whmcs-multisite-provisioning

Location:
domain.com/whmcs-installation
> Setup > Products & Services > Servers

Problem:

The WHMCS Server Page displays a button to LOGIN TO WORDPRESS. When I click the button, the URL that it transports me to is missing the colon and appears as:
http//domain.com/wp-login.php

Result:

In Firefox, I get a Server Not Found page because the URL is missing the colon.

Question:

Where do I correct the typo to restore the colon to the http URL text?