Nitrux OS: No internet despite successful WiFi connection

I installed Nitrux Os(Ubuntu Based) It's successfully connecting to Wifi or Wired connection but Internet ain't sending any traffic. Whenever I am trying to Open a website it is saying This site can't be reached. or Whenever I am trying to ping.It is saying : Ping: www.google.com: Temporary failure in name resolution Software Center and other Internet related applications are saying "No Internet Connection" even my system is connected to WIFI or Wired. I tried to modify /etc/resolv.conf Nameserver from 127.0.1.1 to 8.8.8.8 and 8.8.4.4 but but Whenever I am restarting Network-Manager the Value of nameserver automatically setting back to default 127.0.1.1 Thanks in advance :)