Connection failed to broker please help

02 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1880:1883
2 May 22:29:07 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1880:1883
2 May 22:29:07 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://[::1]:1883
2 May 22:29:08 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1883
2 May 22:29:08 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1880
2 May 22:29:09 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1.1880:1883
2 May 22:29:12 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1880:1883
2 May 22:29:12 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:18

Hi and welcome to the forum.

You didn't say which O/S you are running. But this works if you are on a RasPi or ubuntu.

My local notes below:
You will have to open TWO command lines/terminal sessions.

How to send MQTT messages

-h HOST
-t TOPIC
-m MESSAGE

mosquitto_sub -h 127.0.0.1 -t armtronix_mqtt

mosquitto_pub -h 127.0.0.1 -t armtronix_mqtt -m "Hi this is Armtronix_server"

Show us what you have entered in the MQTT config node settings