MQTT setup in Hassio

I try to set up MQTT, Mosquitto broker addon in Hassio.
But I can’t get it to work, can somebody give me a hand.

And I have created following user for the MQTT.
image

Give MQTT a username and Password DONT make it homeassistand

According to the installation decription, step 3 under Hassio section.

I should configure/add the MQTT Mosquitto broker under the Configuration > Integrations.
But the MQTT is already configure with no devices.

I have not configure it and it give the error as showed above.
Should I still add a user in the add-on config?

Did you create an Access Control List?
As mentioned here: https://www.home-assistant.io/addons/mosquitto/ an explicit ACL definition is now required if you plan to use legacy logins and "anonymous": true.

Don´t forget to add your generated user AND the user homeassistant

I have created an ACL but I thought it should be easier not to use in the beginning.
That why "anonymous": false
Now I get following errors in the logger:

image

Does anybody know what the problem could be?

I just saw this noteification in Hassio.
image
But I don’t know what the problem could be?
Please help