Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromisorInterface' not found in E:\xampp\htdocs\www\yunwei\qr2500\vendor\guzzlehttp\guzzle\src\Pool.php:24 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\yunwei\qr2500\vendor\guzzlehttp\guzzle\src\Pool.php on line 24