Fatal error: Uncaught Error: Class "GrahamCampbell\Manager\AbstractManager" not found in C:\xampp\htdocs\hannoole\PMS\vendor\graham-campbell\gitlab\src\GitLabManager.php:66 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\PMS\vendor\graham-campbell\gitlab\src\GitLabManager.php on line 66