The Flatpack version installed correctly and I was able to make a Win 8.1 VM successfully. This is with Zorin 16.1 Core.
Once I discovered the Flatpack version did not pass through USB to the host and that the "Zorin OS" version was the fix, I uninstalled Gnome Boxes. Per this post: Gnome Boxes- No USB redirection on Flatpak - #5 which sited a successful "Zorin OS" install.
After uninstalling the Flatpack version, via "Software" uninstall, and then installing the "Zorin OS" version I got an install error:
Any idea why I'm getting this error with the Zorin OS version of Gnome Boxes??? I tried again after apt-get autoremove gnome-boxes but got the same result.
After uninstall of Gnome-boxes via "Software" (after the install with the LVM2 error) I ran the following:
sudo apt purge lvm2 && sudo apt install lvm2
per this post:
When using the "Zorin OS" version of the install, there are bad dependencies for lvm2. Purge and reinstall lvm2 per above and the "Zorin OS" version of Gnome-boxes installs correctly via "Software".
As the post points out, this may also happen on other package installs. The error is:
dpkg: error processing package lvm2 (--configure):
installed lvm2 package post-installation script subprocess returned error status 1