php-domxml update
To respond to several follow-up questions I should clarify that resolving the php-domxml dependency issue by simply downloading the RPM and installing it is easy enough but the point is why was it left out of SW-Soft's installation.
When a vendor provides an installation package I do not automatically assume that it is flawed and that it is up to me to fix it. I moved to Plesk from an open source project because I did not have the time to do everything myself. I am prepared to pay for someone else to do the leg-work but instead I feel like I am back where I started.