Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in /opt/lampp/htdocs/myhospitalnow/mhn-hospital-ms/vendorback/guzzlehttp/promises/src/Promise.php:10 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/myhospitalnow/mhn-hospital-ms/vendorback/guzzlehttp/promises/src/Promise.php on line 10