Fatal error: Uncaught Error: Class 'Symfony\Component\Mime\Encoder\Base64Encoder' not found in C:\dolibarr\www\lev-up\vendor\symfony\mime\Encoder\Base64MimeHeaderEncoder.php:17 Stack trace: #0 {main} thrown in C:\dolibarr\www\lev-up\vendor\symfony\mime\Encoder\Base64MimeHeaderEncoder.php on line 17