Ubuntu 20.04 cannot boot live CD in VirtualBox

I am trying to do some testing in Ubuntu, and need a fresh VM. I am at work running Windows 10. I downloaded the latest version of VirtualBox (6.1.10) and the latest version of Ubuntu Desktop 20.04. Unfortunately, I cannot seem to boot the live CD. I see the VBX splash screen, followed by an Ubuntu splash screen (briefly) but then the screen goes black with a blinking cursor (that does not appear to register keystrokes). Doing a bit of research, it appears that the issue is usually video adapter related, but I have tried maxing out the video memory, selecting all three different adapters, enabling and disabling 3D acceleration, and tried Ubuntu 18.04 and the latest Mint, all with the same result. I use VirtualBox regularly at home on Windows and Linux with no problems. Is there something obvious I am missing now?

Go to Source
Author: gillonba