Let me start off by saying I know how frustrating It can be when you can’t find a solution to your problem. Unfortunately I don’t have an answer for you. I do believe however, that you will have better luck finding an answer on the Unix and Linux Stack Exchange
Also the Whonix Support page has some helpful information that I think may be of use to you. If you post your question on Stack Exchange make sure to add the whonix tag.
Please don’t take this the wrong way. I understand that you are using Whonix but this is more of a general Debian/Linux issue. Not only that but you are much more likely to get a solution to your issue as the Stack Exchange community is much bigger than the Whonix community and more eyes will see your question.