Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /home/nextgenc/shieldlink.app/inventory/database/migrations/2015_04_29_234704_add_slack_to_settings.php:6 Stack trace: #0 {main} thrown in /home/nextgenc/shieldlink.app/inventory/database/migrations/2015_04_29_234704_add_slack_to_settings.php on line 6