Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in /home/bigbrainscrm/app.quicksale.in/database/migrations/2026_09_17_182000_add_custom_domain_to_b2b_portal_settings.php:7 Stack trace: #0 {main} thrown in /home/bigbrainscrm/app.quicksale.in/database/migrations/2026_09_17_182000_add_custom_domain_to_b2b_portal_settings.php on line 7