We can consider this a bug report:
https://www.reddit.com/r/Whonix/comments/15aqle3/need_urgent_help/
Or I could say I have a feature request.
If the distribution is unsupported: have a dedicated function to error out such as unsupported_distribution_detected (or better name).
- At this time, your Linux distribution is unsupported by the ${guest_pretty} Installer.
- Alternative: Check if manual installation is supported refer to:
${url_version_domain}/wiki/VirtualBox