Fatal error: Uncaught Error: Class "Illuminate\Support\Collection" not found in /home/marketo/demo.marketoo.com.bd/vendor/spatie/laravel-newsletter/src/NewsletterListCollection.php:8 Stack trace: #0 {main} thrown in /home/marketo/demo.marketoo.com.bd/vendor/spatie/laravel-newsletter/src/NewsletterListCollection.php on line 8