Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /home/digit496/public_html/assets.digitalgmg.com/database/migrations/2019_02_20_234421_make_serial_nullable.php:7 Stack trace: #0 {main} thrown in /home/digit496/public_html/assets.digitalgmg.com/database/migrations/2019_02_20_234421_make_serial_nullable.php on line 7