Fatal error: Uncaught Error: Interface "Symfony\Component\Mime\Encoder\ContentEncoderInterface" not found in D:\Apache24\www\hl_eis-new\vendor\symfony\mime\Encoder\EightBitContentEncoder.php:17 Stack trace: #0 {main} thrown in D:\Apache24\www\hl_eis-new\vendor\symfony\mime\Encoder\EightBitContentEncoder.php on line 17