Network UPS Tools won't start (was OK before)

I’m on Hass.io, version core-2021.4.3, supervisor-2021.03.9, on Raspberry 4.
My NUT installation worked flawlessly before, I was able to get my Tecnoware ups sensors.
I installed a Conbee 2 usb key and the deconz add-on. In the same time I upgraded to the actual version (was 2021.3.2 before).

Now when I try to start NUT add-on I get the following log:

[s6-init] making user provided files available at /var/run/s6/etc...exited 0.
[s6-init] ensuring user provided files have correct perms...exited 0.
[fix-attrs.d] applying ownership & permissions fixes...
[fix-attrs.d] nut: applying... 
[fix-attrs.d] nut: exited 0.
[fix-attrs.d] done.
[cont-init.d] executing container initialization scripts...
[cont-init.d] 00-banner.sh: executing... 
-----------------------------------------------------------
 Add-on: Network UPS Tools
 Manage battery backup (UPS) devices
-----------------------------------------------------------
 Add-on version: 0.6.2
 You are running the latest version of this add-on.
 System: Home Assistant OS 5.13  (aarch64 / raspberrypi4-64)
 Home Assistant Core: 2021.4.3
 Home Assistant Supervisor: 2021.03.9
-----------------------------------------------------------
 Please, share the above information when looking for help
 or support in, e.g., GitHub, forums or the Discord chat.
-----------------------------------------------------------
[cont-init.d] 00-banner.sh: exited 0.
[cont-init.d] 01-log-level.sh: executing... 
Log level is set to DEBUG
[cont-init.d] 01-log-level.sh: exited 0.
[cont-init.d] nut.sh: executing... 
[09:59:54] INFO: Setting mode to netserver...
[09:59:54] INFO: Generating /etc/nut/upsd.users...
[09:59:54] INFO: Configuring user: nutty
[09:59:54] DEBUG: Password SHA1: C10257C62C33EF4629019DA5697BA07108627FD8
[09:59:55] DEBUG: Requested API resource: https://api.pwnedpasswords.com/range/C1025
[09:59:55] DEBUG: API HTTP Response code: 200
[09:59:55] INFO: Password is NOT in the Have I Been Pwned database! Nice!
[09:59:55] INFO: Configuring Device named tecnoware...
[09:59:55] INFO: Starting the UPS drivers...
   0.000000	Starting UPS: tecnoware
  45.005052	Startup timer elapsed, continuing...
Network UPS Tools - UPS driver controller 2.7.4
[cont-init.d] nut.sh: exited 1.
[cont-finish.d] executing container finish scripts...
[cont-finish.d] 99-message.sh: executing... 
-----------------------------------------------------------
                Oops! Something went wrong.

 We are so sorry, but something went terribly wrong when
 starting or running this add-on.
 
 Be sure to check the log above, line by line, for hints.
-----------------------------------------------------------
[cont-finish.d] 99-message.sh: exited 0.
[cont-finish.d] done.
[s6-finish] waiting for services.
[s6-finish] sending all processes the TERM signal.

My NUT configuration:

users:
  - username: nutty
    password: ........
    instcmds:
      - all
    actions: []
devices:
  - name: tecnoware
    driver: blazer_usb
    langid_fix: 1033
    port: auto
    desc: Technoware Era Plus 1100
    config: []
mode: netserver
shutdown_host: 'false'
log_level: debug

I tried removing the conbee and stopping (not uninstalling) the deconz add-on, to no avail.

Can you please help me?

Did you ever get this sorted?