This ultimately did not work. However, eliminating the middle man, i.e. my local machine, seemed to do the job. After paying closer attention to the logs, I found that the issue stemmed from an HTTP error. I loaded Converter on the cluster's vCenter to eliminate my local machine's networking from the equation.
However, now I have new problems: despite my first RHEL P2V's success, I'm having trouble with my second. The Converter helper VM asks for a login to complete the setup. It says the default passwords for "root" and "user" are "password". This does not work. Some Googling has told me that I need to annotate the converter-agent.xml file with a password flag, but that file does not seem to exist within my Converter 5.5 directory. Any ideas?