Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /home/app/htdocs/lidia/database/migrations/2018_03_08_150414_add_slack_notifications.php:7 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/database/migrations/2018_03_08_150414_add_slack_notifications.php on line 7