Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in C:\laragon\www\silontar\database\migrations\2026_03_20_140000_make_perguruan_tinggi_optional_on_data_kelompok.php:8 Stack trace: #0 {main} thrown in C:\laragon\www\silontar\database\migrations\2026_03_20_140000_make_perguruan_tinggi_optional_on_data_kelompok.php on line 8