Uncaught exception 'Google_Auth_Exception' with message 'Could not json decode the token'
I have encountered the same problem. It seems that the latest Google API PHP library is expecting a json encoded token in the setAccessToken method. So what I did as a work around was encoded the tokens to json.
// $token could be retrieved from your SESSION cookie or from your DB.$token = array( 'access_token' => 'XXXXXXX', 'refresh_token' => 'XXXXXXX');$json_token = json_encode($token);$client->setAccessToken($json_token);Hope this helps.
Could you Copy-paste your $_SESSION['access_token']?
Try with this:
http://php.net/manual/es/function.json-last-error.php
In your code, change:
json_decode($_SESSION['access_token']);if (isset($_SESSION['access_token']) && $_SESSION['access_token'] && !json_last_error()) { $client->setAccessToken($_SESSION['access_token']);} else { $authUrl = $client->createAuthUrl();}