Fatal error: Uncaught Error: Class "GrahamCampbell\Manager\AbstractManager" not found in /home/deborapsol/laravel/vendor/costamateus/laravel-mautic-api/src/Mautic.php:11 Stack trace: #0 {main} thrown in /home/deborapsol/laravel/vendor/costamateus/laravel-mautic-api/src/Mautic.php on line 11