After observing for few months, I have noticed that this error
"Something's wrong with the network connection" is caused whenever my home network signal gets cut-off from the range.

While re-connecting, it will give the same above error msg.
And only on restarting the network router, I m able to re-connect to my home network. Due to this I have to activate the mobie data package to use if Wifi doesnt work.

But still no idea what technical issue is causing this error....