Error:Unknown host \'This is usually a temporary error during hostname resolution and means that the local server did not receive a response from an authoritative server\'.
Ok, I don't know how I got this error, I completed my project and when I came back from a short break, I saw this error and I don't know how did I run into it.
But after searching an answer over stack overflow, I didn't get one
So just tried to launch another already completed project and it was also giving the same error
Then I just switch my internet connection from my wifi router to my mobile hotspot and try again and it worked
If you didn't find any answer yet just give this one a try, might this one solve your problem