Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in /var/www/html/dev-invoice-backend/database/migrations/2014_10_29_065301_create_certificates.php:7 Stack trace: #0 {main} thrown in /var/www/html/dev-invoice-backend/database/migrations/2014_10_29_065301_create_certificates.php on line 7