Thanks for suggestion, but I'm afraid this will not work, looking at the addition suggested to the GO file I checked around my file system and "/usr/local/emhttp/plugins/webGui/phaze.page" does not even exist on my system.
Hopefully we will see native support of b12+ within this plugin soon, until then I'll wait!
I just tried it on v6b14b and it worked for me! Thank you! Down side is even though the page is showing up, there hasn't been any compatible Virtualbox releases for it, so it still will not run. At least the page is showing up now.