MQTT Broker Problem - CONNECT failed as CONNACK contained

Hi,

i installed Mosquitto with openhabian, installed MQTT Binding and added the MQTT Broker in the GUI.
But the Broker won’t start/connect:

2021-08-19 22:51:17.530 [INFO ] [.transport.mqtt.MqttBrokerConnection] - Starting MQTT broker connection to '192.168.1.100' with clientid openHAB
==> /var/log/openhab/events.log <==
2021-08-19 22:51:17.527 [INFO ] [ab.event.ThingStatusInfoChangedEvent] - Thing 'mqtt:broker:riot' changed from OFFLINE (COMMUNICATION_ERROR): CONNECT failed as CONNACK contained an Error Code: NOT_AUTHORIZED. to OFFLINE
2021-08-19 22:51:17.553 [INFO ] [ab.event.ThingStatusInfoChangedEvent] - Thing 'mqtt:broker:riot' changed from OFFLINE to OFFLINE (COMMUNICATION_ERROR): CONNECT failed as CONNACK contained an Error Code: NOT_AUTHORIZED.

What did i miss ?
Thank you!

Do you have a username/password setup for Mosquitto? Did you enter those details correctly when you setup your Broker/Bridge Thing in openHAB?

omg, i thought i can choose some new credentials for the broker, not the mosquitto ones. okay now its clear. my “comments in the old files” confused me.

Thanks its working now!