@mylunchbox Answered in your duplicate thread. Please don’t double-post.
@nowhereman OP’s issue is specific to Virtualbox + Windows. Also, unlikely to be related to updates (but I can’t speak to KVM).
Please check here for some troubleshooting ideas:
Search results for 'control port could not be reached' - Whonix Forum
Also, run whonixcheck in a Terminal on both Gateway & Workstation.