I am working on a project that is hosted on Google App Engine, and using app_devserver for local development. At the start I had problems with certificates but when I finall
I had exactly this problem using the Google Drive app, after hours trying to find a solution, I got it to work using the GuzzleHttp sink option
$client = new \Google_Client();
// ... Client Configuration
$httpClient = new Client([
'sink' => 'path_to_any_temp_file',
'base_uri' => $client->getConfig('base_path'),
]);
$client->setHttpClient($httpClient);
Worth the try.