Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\TaskQueueInterface" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\guzzlehttp\promises\src\TaskQueue.php:18 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\guzzlehttp\promises\src\TaskQueue.php on line 18