Fatal error: Uncaught Error: Interface "Illuminate\Routing\RouteCollectionInterface" not found in C:\xampp\htdocs\adminlte3\vendor\laravel\framework\src\Illuminate\Routing 2\AbstractRouteCollection.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\adminlte3\vendor\laravel\framework\src\Illuminate\Routing 2\AbstractRouteCollection.php on line 18