Error: Mqtt based on mosquitto+paho_linux version

I am using mangOH green with a wp7607 module. I want to enstabilish a mqtt connection using a Mosquitto broker. I want to use a Client based on paho on the mangOH.
I downloaded this project from github:

I built it, changing in the file .c the port to mosquitto ( I don’t want to use AirVantage yet). I updated it on, but I see this error:

Which coulb be the cause?

Could be It a library problem only?