Activation of network connection failed in ubuntu 18.04 LTS

I have already posted a question regarding my problem here:

http://askubuntu.com/questions/12710...153093_1271027

But didn't got any helpful response ��

Basically I have a dual booted system with Windows 10 and Ubuntu 18.04 LTS. I can easily connect to my home WiFi with Windows but with Ubuntu I get the following error:

For more info visit the link provided