deCONz Docker Crashes after enabling VNC

Hi all,

I am running the deCONz docker on a Synology DS220+. I have tried to access the deCONZ GUI via VNC, thus I have set VNC_MODE to 1. After that the docker starts but crashes immediately.

Any ideas how to fix it? Thanks!

Here is the log:

[deconzcommunity/deconz] Starting deCONZ...
stdout
23:41:29
[deconzcommunity/deconz] Current deCONZ version: 2.22.02
stdout
23:41:29
[deconzcommunity/deconz] Web UI port: 8080
stdout
23:41:29
[deconzcommunity/deconz] Websockets port: 443
stdout
23:41:29
[deconzcommunity/deconz] Using options --auto-connect=1 --appdata=/opt/deCONZ --dbg-info=1 --dbg-aps=0 --dbg-zcl=0 --dbg-ddf=0 --dbg-dev=0 --dbg-zdp=0 --dbg-ota=0 --dbg-error=0 --dbg-http=0 --http-port=8080 --ws-port=443
stdout
23:41:29
[deconzcommunity/deconz] Modifying user and group ID
stdout
23:41:29
usermod: no changes
stdout
23:41:30
[deconzcommunity/deconz] Checking device group ID
stdout
23:41:31
[deconzcommunity/deconz] VNC port: 5901
stdout
23:41:31
[deconzcommunity/deconz] VNC DISABLE PASSWORD: 0
stdout
23:41:31
hostname: Name or service not known
stdout
23:41:31
tigervncserver: Could not acquire fully qualified host name of this machine.
stdout
23:41:31
hostname: Name or service not known
stdout
23:41:31
tigervncserver: Could not acquire fully qualified host name of this machine.
stdout
23:41:31
hostname: Name or service not known
stdout
23:41:31
tigervncserver: Could not acquire fully qualified host name of this machine.
stdout
23:41:31
WebSocket server settings:
stdout
23:41:31
  - Listen on :6080
stdout
23:41:31
  - Web server. Web root: /usr/share/novnc
stdout
23:41:31
  - SSL/TLS support
stdout
23:41:31
  - Backgrounding (daemon)
stdout
23:41:31
[deconzcommunity/deconz] NOVNC port: 6080
stdout
23:41:31
qt.qpa.xcb: could not connect to display :1
stdout
23:41:31
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
stdout
23:41:31
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
stdout
23:41:31

stdout
23:41:31
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.