Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\spatie\laravel-package-tools\src\PackageServiceProvider.php:21 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\spatie\laravel-package-tools\src\PackageServiceProvider.php on line 21