Openhab 3 Mqtt Broker Problems

Add-ons Bindings
20

so this was my config so far:

UID: mqtt:broker:openHAB
label: MQTT Broker
thingTypeUID: mqtt:broker
configuration:
  lwtQos: 0
  publickeypin: true
  keepAlive: 60
  clientid: 3b875904-088a-49da-8300-72ccd1447766
  qos: 0
  reconnectTime: 60000
  host: localhost
  secure: false
  certificatepin: true
  lwtRetain: true
  enableDiscovery: true

with adding username and password it connects now to the broker again

UID: mqtt:broker:openHAB
label: MQTT Broker
thingTypeUID: mqtt:broker
configuration:
  lwtQos: 0
  publickeypin: true
  keepAlive: 60
  clientid: 4b8ce49d-81fe-410a-bd13-73973849eb25
  secure: false
  certificatepin: true
  password: openhabian
  qos: 0
  reconnectTime: 60000
  host: localhost
  lwtRetain: true
  enableDiscovery: true
  username: openhabian

still I didn’t try to restart the rpi yet. Will do that as a next step. Also I discovered this thread with similar problems described for oh2: Openhabian - Mosquitto MQTT failed to start - #41 by mstormi

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