Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /home/edmedu/www/edmtw.com/dev.bak/database/migrations/2019_09_18_235524_insert_us_early_study_data.php:8 Stack trace: #0 {main} thrown in /home/edmedu/www/edmtw.com/dev.bak/database/migrations/2019_09_18_235524_insert_us_early_study_data.php on line 8