This seems to be a temporary workaround. It has since stopped working with resumption of the same issue. I have to recommend the 10.13.6/Fusion Pro 10 workaround instead.
Just want to bump this post to say this is still an issue. Has anyone got a solution yet? I tried to downgrade my Mac Catalina system to 10.1.6 bit all VM's just end up with a blank screen.