Zigbee2MQTT unable to upgrade / uninstall

Openhab 3.3, RPi4B+
My Zigbee2MQTT stopped running. No webpage is loaded. So I tried to reinstall / uninstall it from config menu and this is what I got:

There was an error or interruption during the execution of: │
│ “20 | Optional Components” │
│ │
│ Please try again. If the error persists, please read │
│ /opt/openhabian/docs/openhabian-DEBUG.md or │
openhabian/openhabian-DEBUG.md at main · openhab/openhabian · GitHub how
│ to proceed.

and then on the background this:

2022-11-16_09:58:11_CET [openHABian] Updating Zigbee2MQTT… FAILED (stop systemctl)

Hard to find the solution on the link. Can anyone help me?

Thanks,
Michal

Set debugmode to maximum as described in section openhabian/openhabian-DEBUG.md at main · openhab/openhabian · GitHub
then start openhabian-config again and run the same command you did before.
This will create lots of output which should give a hint about the root cause.