Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in /home/zdpktgd/ptc/vendor.old/guzzlehttp/promises/src/Coroutine.php:46 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/guzzlehttp/promises/src/Coroutine.php on line 46