Uncaught exception in Google authentication in apiOAuth2.php and apiOAuth2->setAccessToken('{? "access_tok...') error

In this google+ api there is main poblem when ever you use api code it shows some uncaught error.

like : apiOAuth2->setAccessToken('{? "access_tok...')
Or

Fatal error:  Uncaught exception 'apiAuthException' with message 
'Invalid token format' in 
/home/project/public_html/gplus/src/auth/apiOAuth2.php:109
Stack trace:
#0 /home/project/public_html/gplus/src/auth/apiOAuth2.php(74): 
apiOAuth2->setAccessToken('{?  "access_tok...')
#1 /home/project/public_html/gplus/src/apiClient.php(130): 
apiOAuth2->authenticate(Array)
#2 /home/project/public_html/gplus/gplus_login.php(15): 
apiClient->authenticate()
#3 /home/project/public_html/gplus/index.php(9): 
include('/home/project/...')
#4 {main}
thrown in /home/project/public_html/gplus/src/auth/apiOAuth2.php on line 109

and it will not work on localhost

in ..src/auth/apiOAuth2.php file you have the code

$accessToken = json_decode($accessToken, true);
if (! isset($accessToken['access_token']) || ! isset($accessToken['expires_in']) || ! isset($accessToken['refresh_token'])) {
  throw new apiAuthException("Invalid token format");
}

If you will check the value of $accessToken['refresh_token'], you will found that

server did not return any value for $accessToken['refresh_token'];

so i use a way,  like I don't know what is refresh_token made for I added this line :

if (!isset($accessToken['refresh_token'])) $accessToken['refresh_token'] = 12345678910;

copy and paste this code before above  code and upload this file on fine
it will work fine.