It looks like that the interface through Virtual Box works fine as I can see the effect of plug/unplug.
Interesting to mention is that the dongle doesn’t show up in the Integrations as discovered. So not sure if there is any conflict with ZHA that I have setup.
I flashed the latest firmware from Github (thanks Koenkk (Koen Kanters)), but the result is the same.
Anyone else with some hint where to check?
Since you have exhausted everything else maybe try installing z2m standalone in its own VM and see if that works? If not then you should raise an issue on the z2m github.
So you have set up ZHA? You can’t use Z2M and ZHA on the same dongle. This would be a very good reason why it isn’t working.
Hi Nickrout, thanks. But this is not the case. I’ve just given a try to see if the Dongle would be recognized by ZHA, but it is not the intention to run both platforms together. My intention is to migrate from ZHA to Z2M.
But reading some threads, it was expected that the Dongle would appear as a discovered device in the integrations page, and this was not the case. So I tried to discover the device with the current ZHA, but no result.
Is ZHA showing in this page? 
Yes, I can see it. I didn´t mention but I have the Zigbee devices configured with ZHA and I want to migrate them to Z2M when the platform is ready and configured.
ZHA is working fine, but I got convinced that Z2M is more stable and since I want to have my whole lighting and heating system integrated, I want to make sure I have the most stable solution.
Hi rockets, thanks for the motivation and to give a light in the end of the tunnel.
I like the idea, especially because I can run the Z2M independently for HA, which seems a benefit to have a stable operation of Zigbee devices even when HA is not running. Would that be a benefit?
I did some quick research and found this in the official Z2M website:
Installation | Zigbee2MQTT
Did you mean really VM? I didn´t find a solution for a VM. Besides that, it seems quite complicated to setup for both Docker and Windows.
I´m brave enough to start going through this, but would like to ask you first if you would recommend any Youtuber that guides this beautifully?
I could open the case in Github, but wanted to go through this first, as the independent running machine (either VM or Docker) seems to be the best option for me.
Like I said before, you cannot run z2m and zha at the same time.
Do you mean that I need to remove ZHA from Integrations before I even start to configure Z2M? I just wanted to keep ZHA operating with the 6 devices I have before I move them to Z2M. But I would like to start Z2M first. Is there any incompatibility issue to have both Add-Ons / Integrations running? I was not aware of this.
I assume you are using the same dongle for both?
Hi Nickrout, no. For ZHA I´m using a Sonoff ZB Bridge as coordinator.
As you are using virtualbox (I’ve not used this) I presume you just create a new virtual machine with a linux install and do a standard zigbee2mqtt install.
This might also be useful reading Zigbee2mqtt with ZHA?
Good thread, I couldn’t find it earlier.
Now we know that @wilwizard1979 is running two coordinators, there must be some other problem.
Looking back at post 1 in this thread, there seems to be an error in node running zigbee-herdsman-convertors. Try googling those errors. As you have posted pics rather than text, we can’t do it.
Thanks rockets. I’m looking into that. Doing some research first to choose the right VM/Docker platform.
Yes, I’m running HA in Virtual Box.
I could not find a good tutorial to install Z2M in Docker Desktop so I’m moving to the option of having it installed in Ubuntu through a fresh installation in Virtual Box.
Thanks for the hint. I did an update with the code now.
I did some research, found similar errors but nothing that could lead to my issue.
I seriously recommend linux. Virtualbox just introduces problems IMHO.
Hi Nickrout, but I just have 1 hardware PC to run both HA and whatever attachments (eg. Dockers and VMs). PC runs Windows with HA installed in a Virtual Box. What setup do you have in mind?
Ideally a separate machine, maybe ex lease small desktop thing. Run HAOS.
Or start again with your PC. Back it up. Install proxmox. Then you can run a windows install and a HAOS install on the same machine.
I’m not able to go for a second hardware now, but I will consider for the future.
What are the problems do you know for running Z2M in Virtual Box?