Fatal error: Uncaught Error: Interface "League\Event\EmitterInterface" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\league\event\src\Emitter.php:7 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\league\event\src\Emitter.php on line 7