Fatal error: Uncaught Error: Interface 'Symfony\Component\Mime\Encoder\EncoderInterface' not found in D:\xampp\htdocs\psp\backend\vendor\symfony\mime\Encoder\Rfc2231Encoder.php:19 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\symfony\mime\Encoder\Rfc2231Encoder.php on line 19