Mqtt will not start

I cannot seem to get my MQTT integration to start listening.
2022-10-05 08:31:42: New connection from 192.168.1.11:52072 on port 1883.
2022-10-05 08:31:42: Client disconnected, not authorised.
I have checked my user and PW but I get no connection thru the broker.
Should I reinstall the Addon and integration?