Fatal error: Uncaught Error: Interface "Symfony\Component\Serializer\Encoder\EncoderInterface" not found in /var/www/html/API_Forum/vendor/symfony/serializer/Encoder/YamlEncoder.php:26 Stack trace: #0 {main} thrown in /var/www/html/API_Forum/vendor/symfony/serializer/Encoder/YamlEncoder.php on line 26