Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /home/clademy/lms.clademy.com/database/migrations/2017_11_08_045549_make_project_id_nullable_tasks_table.php:9 Stack trace: #0 {main} thrown in /home/clademy/lms.clademy.com/database/migrations/2017_11_08_045549_make_project_id_nullable_tasks_table.php on line 9