Fatal error: Uncaught Error: Class 'Laravel\Socialite\Two\AbstractProvider' not found in C:\xampp\htdocs\admin\vendor\laravel\socialite\src\Two\GitlabProvider.php:5 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\laravel\socialite\src\Two\GitlabProvider.php on line 5