Fatal error: Uncaught Error: Class 'Laravel\Socialite\Two\AbstractProvider' not found in /home/edmedu/www/mig.edmclass.com/front.edmclass.com/vendor/laravel/socialite/src/Two/SlackOpenIdProvider.php:8 Stack trace: #0 {main} thrown in /home/edmedu/www/mig.edmclass.com/front.edmclass.com/vendor/laravel/socialite/src/Two/SlackOpenIdProvider.php on line 8