TimeoutError: Connection attempt failed

[MinaMalak-cmd]

After I initialize DB, and publish fake data. when I start listening on these data, it gives me such an error(check the attached image), what's the problem then?

[made-teale]

looks like the host (broker) is not active anymore. if you try to connect using a GUI app like MQTT explorer it also failed to connect. you can use other free dummy data generators like test.mosquitto.org. but you need to change the database schema since the payload might be different.