Fatal error: Uncaught Error: Class 'Symfony\Component\Mime\Encoder\QpEncoder' not found in G:\projects\bot.edutalk.edu.vn\vendor\symfony\mime\Encoder\QpMimeHeaderEncoder.php:17 Stack trace: #0 {main} thrown in G:\projects\bot.edutalk.edu.vn\vendor\symfony\mime\Encoder\QpMimeHeaderEncoder.php on line 17