Fatal error: Uncaught Error: Class 'Spatie\Crawler\CrawlObserver' not found in /home/clienti2020/public_html/novaballet.it/vendor/spatie/laravel-sitemap/src/Crawler/Observer.php:10 Stack trace: #0 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/spatie/laravel-sitemap/src/Crawler/Observer.php on line 10