Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromisorInterface" not found in /usr/local/www/apache24/data/GoogleAPI/vendor/guzzlehttp/guzzle/src/Pool.php:20 Stack trace: #0 {main} thrown in /usr/local/www/apache24/data/GoogleAPI/vendor/guzzlehttp/guzzle/src/Pool.php on line 20