Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /var/www/dev/public/database/migrations/2017/2017_12_04_191413_CreateTableRetentions.php:7 Stack trace: #0 {main} thrown in /var/www/dev/public/database/migrations/2017/2017_12_04_191413_CreateTableRetentions.php on line 7