Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in C:\xampp\htdocs\new_saas\backend\database\migrations\2026_05_30_120001_add_whatsapp_fields_to_plans.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\new_saas\backend\database\migrations\2026_05_30_120001_add_whatsapp_fields_to_plans.php on line 12