Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in /home/alterna/private_assets.alternalab.it/database/migrations/2015_04_29_234704_add_slack_to_settings.php:6 Stack trace: #0 {main} thrown in /home/alterna/private_assets.alternalab.it/database/migrations/2015_04_29_234704_add_slack_to_settings.php on line 6