Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in /home/shiftict/public_html/laravel8/example-app/vendor/guzzlehttp/promises/src/Coroutine.php:45 Stack trace: #0 {main} thrown in /home/shiftict/public_html/laravel8/example-app/vendor/guzzlehttp/promises/src/Coroutine.php on line 45