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What Wing version do you have? I think the situation is different in Wing 6, which is what the user had in the above-referenced question.
One thing to try to see if it fixes the immediately problem: Copy the file wingdebugpw from your Settings Directory (listed 6th in Wing's About box) into the sitecustomize directory.
Another idea is to try the early access release of Wing 8 at https://wingware.com/wingide/early because it adds support for Docker that automates more of the setup and use. See the Docker How-To in the How-Tos listed in Wing 8's Help menu for details.