Zigbee2MQTT with IOBROKER

Hallo,

I try to install Zigbee2MQTT on a raspberry PI3. For this I want to use a Zigbee USB device (CC2531). I have already flashed the stick with new firmware to use it on Raspberry PI.

This Raspberry Pi shall be used as a Zigbee gateway which communicates with a second PI via LAN.
On the second PI runs IOBROKER with MQTT Broker.

When I started Zigbee2MQTT the PI build up a connection to my IOBROKER installation. But after a few minutes the connection is lost

I get the following errors:
1586236670967-zigbee2mqtt

The only thing I changed after installation was the file: configuration.yaml
I only inserted the server adress of my IOBROKER and the port: “server: mqtt://192.168.178.42:1882”

Does anyone have a tipp for me?

Thanks

Regards

Markus