Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Support\Responsable" not found in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\spatie\laravel-sitemap\src\SitemapIndex.php:11 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\spatie\laravel-sitemap\src\SitemapIndex.php on line 11