adding new scope in google_oauth2 breaks

[gunnrryy]

on adding SCOPE_GPLUS_LOGIN, code breaks and pop up also doesnt close. Error says: error retriving token.

can we do something about it?

[gunnrryy]

default scopes SCOPE_EMAIL, SCOPE_PROFILE are working.
I assume, in this process we are just fetching the AccessToken, where as when i added SCOPE_GPLUS_LOGIN scope, the immidiate error is thrown Error retriving Token which is set later on in my process.
tried to debug it. in serviceProxy;

$data = $this->service->parseAccessTokenResponse($responseBody);
$data['error'] is set and responds invalid_grant