Fatal error: Uncaught Error: Class 'Symfony\Component\Mime\Encoder\Base64Encoder' not found in D:\xampp7\htdocs\www\nbkm\show_ir\vendor\symfony\mime\Encoder\Base64MimeHeaderEncoder.php:17 Stack trace: #0 {main} thrown in D:\xampp7\htdocs\www\nbkm\show_ir\vendor\symfony\mime\Encoder\Base64MimeHeaderEncoder.php on line 17