Fatal error: Uncaught Google\Service\Exception: { "error": "invalid_grant", "error_description": "Bad Request" } in /home/webtesting/public_html/mycalendar/src/Http/REST.php:128 Stack trace: #0 /home/webtesting/public_html/mycalendar/src/Http/REST.php(103): Google\Http\REST::decodeHttpResponse(Object(GuzzleHttp\Psr7\Response), Object(GuzzleHttp\Psr7\Request), 'Google_Service_...') #1 [internal function]: Google\Http\REST::doExecute(Object(GuzzleHttp\Client), Object(GuzzleHttp\Psr7\Request), 'Google_Service_...') #2 /home/webtesting/public_html/mycalendar/src/Task/Runner.php(182): call_user_func_array(Array, Array) #3 /home/webtesting/public_html/mycalendar/src/Http/REST.php(66): Google\Task\Runner->run() #4 /home/webtesting/public_html/mycalendar/src/Client.php(898): Google\Http\REST::execute(Object(GuzzleHttp\Client), Object(GuzzleHttp\Psr7\Request), 'Google_Service_...', Array, NULL) #5 /home/webtesting/public_html/mycalendar/src/Service/Resource.php(238): Google\Client->execute(Object(GuzzleHttp\Psr7\Request), 'Goo in /home/webtesting/public_html/mycalendar/src/Http/REST.php on line 128