Using the oVirt user VM portal seems to not work through the squid proxy setup (configured as per the guide). The page loads and login works fine through the proxy, but the asynchronous requests just hang. I've attached a screenshot, but you can see the "api" endpoint just hanging in a web inspector:

"https://proxyfqdn/ovirt-engine/api/"

This works fine when not going through the proxy.

Is there a way to force noVNC HTML as the console mode through the web-ui, or at least have it as an option if not default?

The console seems not to work when logged in with a base 'user role'.