Zigbee2MQTT not starting with Sonoff Zigbee Dongle Plus - P

Hi,

i bought a Sonoff Zigbee 3.0 USB Dongle Plus - P and tried to get Zigbee2MQTT working. I have it connected to a powered USB-Hub, which also powers my SSD and my RF-USB for RaspberryMatic (all of them work fine).

I followed the instructions from here: GitHub - zigbee2mqtt/hassio-zigbee2mqtt: Official Zigbee2MQTT Home Assistant add-on

i updated the Firmware to the latest coordinator Firmware (20240710) using the Zigstar GW multitool without any errors

My Configuration:

data_path: /config/zigbee2mqtt
socat:
  enabled: false
  master: pty,raw,echo=0,link=/tmp/ttyZ2M,mode=777
  slave: tcp-listen:8485,keepalive,nodelay,reuseaddr,keepidle=1,keepintvl=1,keepcnt=5
  options: "-d -d"
  log: false
mqtt: {}
serial:
  port: >-
    /dev/serial/by-id/usb-ITead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_e2c6aea66cafed11a57c394e71c9e8b5-if00-port0
  adapter: zstack

and while starting i get this error:

[20:02:55] INFO: Preparing to start...
[20:02:56] INFO: Socat not enabled
[20:02:58] INFO: Starting Zigbee2MQTT...
Starting Zigbee2MQTT without watchdog.
[2024-08-27 20:03:04] info: 	z2m: Logging to console, file (filename: log.log)
[2024-08-27 20:03:04] info: 	z2m: Starting Zigbee2MQTT version 1.39.1 (commit #unknown)
[2024-08-27 20:03:04] info: 	z2m: Starting zigbee-herdsman (0.55.3)
[2024-08-27 20:03:04] info: 	zh:zstack:znp: Opening SerialPort with {"path":"/dev/serial/by-id/usb-ITead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_e2c6aea66cafed11a57c394e71c9e8b5-if00-port0","baudRate":115200,"rtscts":false,"autoOpen":false}
[2024-08-27 20:03:04] info: 	zh:zstack:znp: Serialport opened
[2024-08-27 20:03:05] info: 	zh:zstack:znp: Writing CC2530/CC2531 skip bootloader payload
[2024-08-27 20:03:06] info: 	zh:zstack:znp: Skip bootloader for CC2652/CC1352
[2024-08-27 20:03:24] error: 	z2m: Error while starting zigbee-herdsman
[2024-08-27 20:03:24] error: 	z2m: Failed to start zigbee
[2024-08-27 20:03:24] error: 	z2m: Check https://www.zigbee2mqtt.io/guide/installation/20_zigbee2mqtt-fails-to-start.html for possible solutions
[2024-08-27 20:03:24] error: 	z2m: Exiting...
[2024-08-27 20:03:25] error: 	z2m: Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms)
    at ZStackAdapter.start (/app/node_modules/zigbee-herdsman/src/adapter/z-stack/adapter/zStackAdapter.ts:119:27)
    at Controller.start (/app/node_modules/zigbee-herdsman/src/controller/controller.ts:127:29)
    at Zigbee.start (/app/lib/zigbee.ts:63:27)
    at Controller.start (/app/lib/controller.ts:139:27)
    at start (/app/index.js:154:5)

I tried everything from here: Zigbee2MQTT fails to start | Zigbee2MQTT

i have writing access to the usb, the power should be adequate, ZHA was never and is not installed.

I am at my wits end for troubleshooting. is there anything i overlooked? has anyone another idea? Maybe something else is blocking the access? is there a way to see something like that?