Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in /opt/lampp/htdocs/forum/flarum/vendor/illuminate/support/AggregateServiceProvider.php:5 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/illuminate/support/AggregateServiceProvider.php on line 5