Ubuntu 20.04 fvwm and translucency

Hi All,
I am using fvwm as my favourite window management system and I would like to achieve total independence, I managed for most parts except for translucency.
You might think it is just for show but i noticed that it affects screen sharing with Team and Zoom, where there should be a layer on top of the screen for annotations, and that, at the moment appears black.

I managed in the past to trigger that, via the patch, but that was 10 years ago and now I do not anymore, I am really at my wits ends and I would love for someone to help!

I am sure that it can be a trigger or something but I just do not know what to do,

Code:
mau*~lsb_release -a
No LSB modules are available.
Distributor ID:Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal
mau*~fvwm --version
fvwm 2.6.8 compiled on Jan 14 2019 at 19:59:25
with support for: ReadLine, RPlay, Stroke, XPM, SVG, Shape, XShm, SM, Bidi text, Xinerama, XRender, XCursor, XFT, NLS

fvwm comes with NO WARRANTY, to the extent permitted by law. You may
redistribute copies of fvwm under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING.
mau*~
Thanks

Maurizio