Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /var/www/dev/public/database/migrations/2019/2019_02_11_110401_ModifyPlanCuentasNiveles6.php:7 Stack trace: #0 {main} thrown in /var/www/dev/public/database/migrations/2019/2019_02_11_110401_ModifyPlanCuentasNiveles6.php on line 7