Fatal error: Uncaught Error: Interface "Psr\Http\Message\RequestFactoryInterface" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\guzzlehttp\psr7\src\HttpFactory.php:26 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\guzzlehttp\psr7\src\HttpFactory.php on line 26