RaspberryMatic add-on gives '502 Bad Gateway'

I am trying to install RaspberryMatic CCU (Current version: 3.59.6.20210810-8090fdb) as an add-on to home assistant.

All steps according to the instructions in ‘Supervisor’ RaspberryMatic CCU. But no success.

Whenever I click on RaspberryMatic in the sidebar I get a ‘502: Bad Gateway’ error.

Does anybody have any ideas on how to clear this error?

Brgds
Alois

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The supervisor log shows:

21-09-16 10:20:24 ERROR (MainThread) [supervisor.api.ingress] Ingress error: Cannot connect to host 172.30.33.1:8099 ssl:default [Connect call failed (‘172.30.33.1’, 8099)]

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Here is the RaspberryMatic CCU log:

Mounting /data as /usr/local (Home Assistant Add-On): OK
Starting watchdog…
Identifying onboard hardware: oci, OK
Initializing RTC Clock: no hardware found
Running sysctl: OK
Checking for Factory Reset: not required
Checking for Backup Restore: not required
Initializing System: OK
Starting logging: OK
Init onboard LEDs: init, OK
Starting irqbalance: OK
Starting network: eth0: link up, fixed, firewall, inet up, 172.30.33.1, OK
Identifying Homematic RF-Hardware: …HmRF: HM-MOD-RPI-PCB/GPIO, HmIP: HM-MOD-RPI-PCB/GPIO, OK
Updating Homematic RF-Hardware: HM-MOD-RPI-PCB: 2.8.6, OK
Starting hs485dLoader: disabled
Starting xinetd: OK
Starting eq3configd: OK
Starting lighttpd: OK
Starting ser2net: disabled
Starting ssdpd: OK
Starting ha-proxy: OK
Starting NUT services: disabled
Initializing Third-Party Addons: OK
Starting LGWFirmwareUpdate: …OK
Setting LAN Gateway keys: OK
Starting hs485d: disabled
Starting multimacd: .OK
Starting rfd: .OK
Starting HMIPServer: …OK
Starting ReGaHss: .OK
Starting CloudMatic: OK
Starting NeoServer: disabled
Starting Third-Party Addons: OK
Starting crond: OK
Setup onboard LEDs: booted, OK

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Radio: HM-MOD-RPI-PCB on Raspi-GPIO
alternativ: HB-RF-UB-TK

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home assistant data:

Version core-2021.9.6
Version supervisor-2021.09.0
Operating System Home Assistant OS 6.4

System Health

version: core-2021.9.6
installation_type: Home Assistant OS
dev: false
hassio: true
docker: true
user: root
virtualenv: false
python_version: 3.9.6
os_name: Linux
os_version: 5.10.17-v8
arch: aarch64
timezone: Europe/Vienna

host_os: Home Assistant OS 6.4
update_channel: stable
supervisor_version: supervisor-2021.09.0
docker_version: 20.10.7
disk_total: 28.6 GB
disk_used: 4.1 GB
healthy: true
supported: true
board: rpi4-64
supervisor_api: ok
version_api: ok
installed_addons: Visual Studio Code (3.6.2), Samba share (9.5.1), SSH & Web Terminal (9.0.1), Log Viewer (0.11.1), RaspberryMatic CCU (3.59.6.20210810-8090fdb)

dashboards: 1
resources: 0
views: 1
mode: storage

Home Assistant Supervisor
Host Operating System Home Assistant OS 6.4
Update Channel stable
Supervisor Version supervisor-2021.09.0
Docker Version 20.10.7
Disk Total 28.6 GB
Disk Used 4.1 GB
Healthy true
Supported true
Board rpi4-64
Supervisor API ok
Version API ok
Installed Add-ons Visual Studio Code (3.6.2), Samba share (9.5.1), SSH & Web Terminal (9.0.1), Log Viewer (0.11.1), RaspberryMatic CCU (3.59.6.20210810-8090fdb)

Did you solve the problem? I have the same.