Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in /home/sourceex/public_html/pm/database/migrations/2017_08_30_123956_add_slack_username_column_employee_details_table.php:7 Stack trace: #0 {main} thrown in /home/sourceex/public_html/pm/database/migrations/2017_08_30_123956_add_slack_username_column_employee_details_table.php on line 7