Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in /home/robc3686/public_html/hrm-obji/database/migrations/2025_02_21_045222_change_grade_column_in_study_groups.php:7 Stack trace: #0 {main} thrown in /home/robc3686/public_html/hrm-obji/database/migrations/2025_02_21_045222_change_grade_column_in_study_groups.php on line 7