Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in C:\laragon\www\silontar\database\migrations\2026_03_20_136000_add_data_kelompok_relation_to_mahasiswas.php:9 Stack trace: #0 {main} thrown in C:\laragon\www\silontar\database\migrations\2026_03_20_136000_add_data_kelompok_relation_to_mahasiswas.php on line 9