Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Support\Jsonable" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\laravel\framework\src\Illuminate\Support\MessageBag.php:12 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\laravel\framework\src\Illuminate\Support\MessageBag.php on line 12