Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\laravel\sail\src\SailServiceProvider.php:9 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\laravel\sail\src\SailServiceProvider.php on line 9