Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\TaskQueueInterface" not found in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\guzzlehttp\promises\src\TaskQueue.php:18 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\guzzlehttp\promises\src\TaskQueue.php on line 18