Fatal error: Uncaught Error: Class 'Illuminate\Database\Migrations\Migration' not found in /home/kingelearn/public_html/database/migrations/2020_09_09_105230_add_pk_to_course_tests.php:7 Stack trace: #0 {main} thrown in /home/kingelearn/public_html/database/migrations/2020_09_09_105230_add_pk_to_course_tests.php on line 7