Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Encoder\Base64Encoder" not found in D:\xampp\htdocs\bkash-biller-portal-app\backup_21_01_2026\vendor\symfony\mime\Encoder\Base64ContentEncoder.php:19 Stack trace: #0 {main} thrown in D:\xampp\htdocs\bkash-biller-portal-app\backup_21_01_2026\vendor\symfony\mime\Encoder\Base64ContentEncoder.php on line 19