Fatal error: Uncaught Error: Interface 'Symfony\Component\Mime\Encoder\ContentEncoderInterface' not found in C:\xampp\htdocs\admin\vendor\symfony\mime\Encoder\QpContentEncoder.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\symfony\mime\Encoder\QpContentEncoder.php on line 17