(nodemon) app crashed - waiting for file changes before starting

I cloned this repo from gitHub so, while installing in the last step I try to run this command:

~/mqtt-gateway$ WEB_API_URL=http://localhost:3000 npm start

And I get this error:

[nodemon] app crashed - waiting for file changes before starting...

I've read that possibly is because of a process that haven't been terminated but I've been unable to solve it.

Hope you can help. Thank you ;)

Solution

In the error output it said:

Error: listen EADDRINUSE :::1883

The port used for this program is 1883 and I was running mosquitto on that same port so I killed it:

netstat -plten |grep mosquitto

and then

kill -9 PID

like in this question.

Just in case anyone faces a similar problem.