Mosquito MQTT Broker wont start but works

Configuration
1

Hi…I am kinda lost …

I have HA working well on a Pi4 an it is working well.
Lately i wanted to install Z2Mqtt but it wont start. Then i checked the Mosquito Broker and it was closed too.
And i cannot start it!
I checked the protocol and it said it is started.
I have a Door lock connected via MQTT and it is working too.
But the MQTT broker wont start.

any ideas?

2

Check what broker the door lock is connected to.

3

Its a Nuki lock and i can see it in the MQTT intigration,
is that what you need to know?

4

If your Nuki lock works over MQTT, and your Mosquitto broker won’t start, your Nuki lock is probably connected to another broker. Check which broker that is.