Fatal error: Uncaught Error: Interface "Amp\Http\Client\RequestBody" not found in /home/zdpktgd/ptc/vendor/amphp/http-client/src/Body/StringBody.php:11 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor/amphp/http-client/src/Body/StringBody.php on line 11