A new TechNote has been added regarding this issue:
https://support.symantec.com/en_US/article.TECH246952.html
Basically need to edit the httpd.conf file (make a backup first) and copy in the directives/material that is found in that technote. After copying in the directive (and updating the url in the sample to the url of your SEPM site) restart your SEPM server so the web server restarts as needed. Wait for the server to restart, after restart, try connecting to your SEPM console. The connection should work as intended. You can then run a scan tool to check to see if you meet the expected requirements/configuration.
SEPM uses Apache, so anyone familiar with Apache should understand how to add this directive in.
The path to find the file should be something like this on a Windows server:
\Program Files (x86)\Symantec\Symantec Endpoint Protection Manager\apache
Hopefully this helps someone else.