Pfsense monitoring Icinga2 - CRITICAL - Plugin timed out after 10 seconds

Recently added new pfsense system, existing one working as expected.I have installed package nagios-plugins on pfsense for monitoring like existing pfsense.
Scripts downloaded from here:

All the services show critical:

I am getting error on icinga2 web interface :
Plugin Output
CRITICAL - Plugin timed out after 10 seconds**

This is not an Icinga or Icingaweb problem.
Probably you have not configured your pfesense nrpe settings correctly.

Should i need to install NRPE package or where i can find NRPE?