Fatal error: Uncaught Error: Class "GuzzleHttp\Promise\RejectionException" not found in /home/staging/ecrm.staging.teks.co.in/vendor/guzzlehttp/promises/src/CancellationException.php:10 Stack trace: #0 {main} thrown in /home/staging/ecrm.staging.teks.co.in/vendor/guzzlehttp/promises/src/CancellationException.php on line 10