facing issue with Nas configuration..

Hi team, i configured Freeradius version3 with ubuntu 16 server. also configured all files. but i am facing issue when i am trying radius.net client.so error screenshot i have added. I am confisued with NAS config in clients.conf file. radiusclient i am calling from my local system.so my configuration is like client user-PC { ipaddr = my radius ip secret = xxxxxxxxxx } Please help me on that.