Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in /var/www/html/app/vendor/laravel/framework/src/Illuminate/Concurrency/ConcurrencyServiceProvider.php:8 Stack trace: #0 {main} thrown in /var/www/html/app/vendor/laravel/framework/src/Illuminate/Concurrency/ConcurrencyServiceProvider.php on line 8